Sebastian Barg
Professor at Department of Medical Cell Biology; Research Group Sebastian Barg
- Telephone:
- +46 18 471 46 60
- E-mail:
- sebastian.barg@mcb.uu.se
- Visiting address:
- BMC
Husargatan 3
751 23 Uppsala - Postal address:
- Box 571
751 23 UPPSALA
Short presentation
My research group studies the cell biology of insulin secretion using advanced light microscopy (TIRF, single molecule imaging) and patch clamp electrophysiology; a particular focus is on the regulated exocytosis of secretory granules. I teach cell biology and general endocrinology.
Biography
- 1995 MSc Biochemistry Free University Berlin
- 1995 undergraduate thesis Vanderbilt University (with Sid Fleischer)
- 2001 PhD Medical Sciences Lund University (with P Rorsman)
- 2002 Assistant professor (Swedish Science Council/Vetenskapsrådet)
- 2002-06 postdoc Vollum Institute Portland OR (with W Almers)
- 2007 research assistant professor Oregon Health & Science University
- 2007 lecturer Imperial College London
- 2008 Assistant professor Uppsala University
- 2016 Associate professor Uppsala University
- 2019 Professor Uppsala University
honors:
- 2001 best PhD thesis Medical faculty Lund
- 2002 Swedish Research Council (VR) assistant professor position
- 2002 EMBO longterm fellowship
- 2002 STINT fellowship award
- 2002 Swedish Society for Medical Research fellowship award
- 2002 Albert Renold Career Development Award (EFSD)
- 2005 Wallenberg fellowship award in Nano/micro Science
- 2008 Zetterling fellowship award
- 2008-11 Göran Gustafsson award in human biology

Publications
Selection of publications
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Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Part of Nature Communications, 2020
- DOI for Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
- Download full text (pdf) of Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
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Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Part of eLIFE, 2019
- DOI for Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
- Download full text (pdf) of Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
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Glucose-Dependent Granule Docking Limits Insulin Secretion and Is Decreased in Human Type 2 Diabetes
Part of Cell Metabolism, p. 470-478, 2018
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Syntaxin clusters at secretory granules in a munc18-bound conformation
Part of Molecular Biology of the Cell, p. 2700-2708, 2018
- DOI for Syntaxin clusters at secretory granules in a munc18-bound conformation
- Download full text (pdf) of Syntaxin clusters at secretory granules in a munc18-bound conformation
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Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Part of Journal of Clinical Investigation, p. 2353-2364, 2017
- DOI for Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
- Download full text (pdf) of Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
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Contact-induced clustering of syntaxin and munc18 docks secretory granules at the exocytosis site
Part of Nature Communications, 2014
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Syntaxin clusters assemble reversibly at sites of secretory granules in live cells
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20804-20809, 2010
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Part of Neuron, p. 287-299, 2002
Recent publications
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Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
Part of Cellular and Molecular Life Sciences (CMLS), 2026
- DOI for Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
- Download full text (pdf) of Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
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Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
Part of Cell Reports, 2025
- DOI for Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
- Download full text (pdf) of Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
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VAMP8 Is an Endosomal v-SNARE That Supports GLP-1 Receptor Recycling in Pancreatic β-Cells
Part of Diabetes, p. 1577-1588, 2025
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Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
Part of Nature Communications, 2025
- DOI for Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
- Download full text (pdf) of Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
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Part of eLIFE, 2024
All publications
Articles in journal
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Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
Part of Cellular and Molecular Life Sciences (CMLS), 2026
- DOI for Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
- Download full text (pdf) of Functional differences of Munc18 isoforms reflect their affinities for the exocytosis site
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Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
Part of Cell Reports, 2025
- DOI for Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
- Download full text (pdf) of Dynamic recruitment of Munc13 primes docked secretory granules for exocytosis
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VAMP8 Is an Endosomal v-SNARE That Supports GLP-1 Receptor Recycling in Pancreatic β-Cells
Part of Diabetes, p. 1577-1588, 2025
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Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
Part of Nature Communications, 2025
- DOI for Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
- Download full text (pdf) of Highly adaptable deep-learning platform for automated detection and analysis of vesicle exocytosis
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Part of eLIFE, 2024
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RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
Part of Diabetologia, p. 1642-1662, 2024
- DOI for RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
- Download full text (pdf) of RFX6 haploinsufficiency predisposes to diabetes through impaired beta cell function
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Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
Part of Cell Reports, 2023
- DOI for Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
- Download full text (pdf) of Local PI(4,5)P2 signaling inhibits fusion pore expansion during exocytosis
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The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
Part of Journal of Cell Biology, 2023
- DOI for The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
- Download full text (pdf) of The β-cell primary cilium is an autonomous Ca2+ compartment for paracrine GABA signaling
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SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
Part of PLoS biology, 2023
- DOI for SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
- Download full text (pdf) of SEC14-like condensate phase transitions at plasma membranes regulate root growth in Arabidopsis
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Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
Part of Nature Communications, 2023
- DOI for Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
- Download full text (pdf) of Restoration of PITPNA in Type 2 diabetic human islets reverses pancreatic beta-cell dysfunction
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Part of Proceedings of the National Academy of Sciences of the United States of America, 2022
- DOI for Alternative splicing encodes functional intracellular CD59 isoforms that mediate insulin secretion and are down-regulated in diabetic islets
- Download full text (pdf) of Alternative splicing encodes functional intracellular CD59 isoforms that mediate insulin secretion and are down-regulated in diabetic islets
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Part of Nature Biotechnology, p. 1042-1055, 2022
- DOI for Functional, metabolic and transcriptional maturation of human pancreatic islets derived from stem cells.
- Download full text (pdf) of Functional, metabolic and transcriptional maturation of human pancreatic islets derived from stem cells.
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Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
Part of Nature Communications, 2020
- DOI for Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
- Download full text (pdf) of Paracrine control of α-cell glucagon exocytosis is compromised in human type-2 diabetes.
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Part of Proceedings of the National Academy of Sciences of the United States of America, p. 2484-2495, 2020
- DOI for In pancreatic islets from type 2 diabetes patients, the dampened circadian oscillators lead to reduced insulin and glucagon exocytosis
- Download full text (pdf) of In pancreatic islets from type 2 diabetes patients, the dampened circadian oscillators lead to reduced insulin and glucagon exocytosis
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Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
Part of eLIFE, 2019
- DOI for Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
- Download full text (pdf) of Fusion pore regulation by cAMP/Epac2 controls cargo release during insulin exocytosis
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Part of Diabetes, p. 747-760, 2019
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Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
Part of EBioMedicine, 2018
- DOI for Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
- Download full text (pdf) of Functional Characterization of Native, High-Affinity GABAA Receptors in Human Pancreatic β Cells
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PtdIns(4,5)P2 is not required for secretory granule docking
Part of Traffic, p. 436-445, 2018
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Glucose-Dependent Granule Docking Limits Insulin Secretion and Is Decreased in Human Type 2 Diabetes
Part of Cell Metabolism, p. 470-478, 2018
-
Syntaxin clusters at secretory granules in a munc18-bound conformation
Part of Molecular Biology of the Cell, p. 2700-2708, 2018
- DOI for Syntaxin clusters at secretory granules in a munc18-bound conformation
- Download full text (pdf) of Syntaxin clusters at secretory granules in a munc18-bound conformation
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MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
Part of Physiological Reports, 2017
- DOI for MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
- Download full text (pdf) of MiR-335 overexpression impairs insulin secretion through defective priming of insulin vesicles
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Recruitment of Epac2A to Insulin Granule Docking Sites Regulates Priming for Exocytosis
Part of Diabetes, p. 2610-2622, 2017
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Plasma membrane PI(4,5)P-2 is critical for secretory granule exocytosis
Part of Molecular Biology of the Cell, p. 3727-3727, 2017
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Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
Part of Journal of Clinical Investigation, p. 2353-2364, 2017
- DOI for Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
- Download full text (pdf) of Ca2+ channel clustering with insulin-containing granules is disturbed in type 2 diabetes
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Part of PLOS ONE, 2016
- DOI for Statistical Frailty Modeling for Quantitative Analysis of Exocytotic Events Recorded by Live Cell Imaging: Rapid Release of Insulin-Containing Granules Is Impaired in Human Diabetic beta-cells
- Download full text (pdf) of Statistical Frailty Modeling for Quantitative Analysis of Exocytotic Events Recorded by Live Cell Imaging: Rapid Release of Insulin-Containing Granules Is Impaired in Human Diabetic beta-cells
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Part of CELL CHEMICAL BIOLOGY, p. 816-826, 2016
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How Kiss-and-Run Can Make Us Sick: SOX4 Puts a Break on the Pore
Part of Diabetes, p. 1791-1793, 2016
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Quantitative Imaging of the Exocytosis Machinery Assembly
Part of Biophysical Journal, 2015
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Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
Part of PLOS ONE, 2015
- DOI for Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
- Download full text (pdf) of Survey of Red Fluorescence Proteins as Markers for Secretory Granule Exocytosis
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Part of Diabetologia, 2015
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G-protein coupled receptor dynamics in insulin secreting cells
Part of Diabetologia, 2015
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CD59 is required for pancreatic beta cell insulin exocytosis
Part of Molecular Immunology, p. 279-279, 2014
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Contact-induced clustering of syntaxin and munc18 docks secretory granules at the exocytosis site
Part of Nature Communications, 2014
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The Complement Inhibitor CD59 Regulates Insulin Secretion by Modulating Exocytotic Events
Part of Cell Metabolism, p. 883-890, 2014
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Part of PLOS ONE, 2013
- DOI for In Intact Islets Interstitial GABA Activates GABA(A) Receptors That Generate Tonic Currents in alpha-Cells
- Download full text (pdf) of In Intact Islets Interstitial GABA Activates GABA(A) Receptors That Generate Tonic Currents in alpha-Cells
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Part of Cellular Signalling, p. 85-92, 2013
- DOI for Aberrant association between vascular endothelial growth factor receptor-2 and VE-cadherin in response to vascular endothelial growth factor-a in Shb-deficient lung endothelial cells
- Download full text (pdf) of Aberrant association between vascular endothelial growth factor receptor-2 and VE-cadherin in response to vascular endothelial growth factor-a in Shb-deficient lung endothelial cells
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PPARβ/δ affects pancreatic β cell mass and insulin secretion in mice
Part of Journal of Clinical Investigation, p. 4105-4117, 2012
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Multivesicular exocytosis in rat pancreatic beta cells
Part of Diabetologia, p. 1001-1012, 2012
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cAMP Mediators of Pulsatile Insulin Secretion from Glucose-stimulated Single β-Cells
Part of Journal of Biological Chemistry, p. 23005-23016, 2010
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Quantitative analysis of t-SNARE and Ca2+-channel clusters near secretory granules
Part of Diabetologia, 2010
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Defective secretion of islet hormones in chromogranin-B deficient mice
Part of PLOS ONE, 2010
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Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20810-20815, 2010
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Syntaxin clusters assemble reversibly at sites of secretory granules in live cells
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 20804-20809, 2010
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Impaired glucose homeostasis in Shb-/- mice
Part of Journal of Endocrinology, p. 271-279, 2009
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TCF7L2 regulates late events in insulin secretion from pancreatic islet beta-cells
Part of Diabetes, p. 894-905, 2009
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Part of Biochemical and Biophysical Research Communications - BBRC, p. 241-246, 2009
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Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
Part of The Journal of neuroscience : the official journal of the Society for Neuroscience, p. 1894-1903, 2008
- DOI for Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
- Download full text (pdf) of Release of the styryl dyes from single synaptic vesicles in hippocampal neurons.
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Granule docking and cargo release in pancreatic β-cells
Part of Biochemical Society Transactions, p. 294-299, 2008
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Selective nucleotide-release from dense-core granules in insulin-secreting cells
Part of Journal of Cell Science, p. 4271-82, 2005
- DOI for Selective nucleotide-release from dense-core granules in insulin-secreting cells
- Download full text (pdf) of Selective nucleotide-release from dense-core granules in insulin-secreting cells
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Part of Diabetes, p. 2852-8, 2005
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Large dense-core vesicle exocytosis in pancreatic beta-cells monitored by capacitance measurements.
Part of Methods, p. 302-11, 2004
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Insulin secretion: a high-affinity Ca2+ sensor after all?
Part of The Journal of General Physiology, p. 623-5, 2004
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Mechanisms of exocytosis in insulin-secreting B-cells and glucagon-secreting A-cells.
Part of Pharmacology and Toxicology, p. 3-13, 2003
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SUR1 regulates PKA-independent cAMP-induced granule priming in mouse pancreatic B-cells.
Part of The Journal of General Physiology, p. 181-97, 2003
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Characterization of a naturally occurring mutation (L107I) in the HNF1 alpha (MODY3) gene.
Part of Diabetologia, p. 1703-8, 2002
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Effect of mutant alpha-synuclein on dopamine homeostasis in a new human mesencephalic cell line.
Part of Journal of Biological Chemistry, p. 38884-94, 2002
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Part of Journal of Membrane Biology, p. 51-64, 2002
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Fast insulin secretion reflects exocytosis of docked granules in mouse pancreatic B-cells.
Part of Pflügers Archiv, p. 43-51, 2002
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Part of Diabetes, 2002
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Part of Diabetes, 2002
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Part of Neuron, p. 287-299, 2002
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Priming of insulin granules for exocytosis by granular Cl(-) uptake and acidification
Part of Journal of Cell Science, p. 2145-54, 2001
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Fast exocytosis with few Ca(2+) channels in insulin-secreting mouse pancreatic B cells
Part of Biophysical Journal, p. 3308-23, 2001
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Part of Journal of Physiology, p. 509-20, 2000
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Tight coupling between electrical activity and exocytosis in mouse glucagon-secreting alpha-cells.
Part of Diabetes, p. 1500-10, 2000
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Part of Journal of Physiology, p. 109-20, 2000
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Patch-clamp characterisation of somatostatin-secreting -cells in intact mouse pancreatic islets.
Part of Journal of Physiology, p. 497-507, 2000
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The Cell Physiology of Biphasic Insulin Secretion.
Part of News in Physiological Sciences - NIPS, p. 72-77, 2000
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Voltage-gated and resting membrane currents recorded from B-cells in intact mouse pancreatic islets.
Part of Journal of Physiology, p. 717-28, 1999
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Part of The Journal of General Physiology, p. 759-70, 1999
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The voltage sensitive Lc-type Ca2+ channel is functionally coupled to the exocytotic machinery.
Part of Proceedings of the National Academy of Sciences of the United States of America, p. 248-53, 1999
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Part of Proceedings of the National Academy of Sciences of the United States of America, p. 5539-44, 1999
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Part of The Journal of General Physiology, p. 217-28, 1997
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Part of Pflügers Archiv, p. 515-24, 1997
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Heterogeneity of Ca2+ gating of skeletal muscle and cardiac ryanodine receptors.
Part of Biophysical Journal, p. 141-56, 1997
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Part of American Journal of Physiology, 1997
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Selective binding of FKBP12.6 by the cardiac ryanodine receptor.
Part of Journal of Biological Chemistry, p. 20385-91, 1996
Articles, review/survey
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Compensatory endocytosis in chromaffin cells
Part of Acta Physiologica, p. 195-201, 2008
Chapters in book
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Quantification of Secretory Granule Exocytosis by TIRF Imaging and Capacitance Measurements
Part of Chromaffin cells, p. 179-186, Springer Nature, 2023