Statistical analysis of the quantal basis of secretory granule formation

Marika Křepelová-Dror; Ilan Hammel; Isaac Meilijson

doi:10.1002/jemt.22305

Statistical analysis of the quantal basis of secretory granule formation

Marika Křepelová-Dror, Ilan Hammel^*, Isaac Meilijson

^*Corresponding author for this work

School of Mathematical Sciences

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The size distribution of vesicles exocytosed from secretory cells displays quantal nature, vesicle volume is periodic multi-modal, suggesting that these heterogeneous vesicles are aggregate sums of a variable number of homogeneous basic granules. Whether heterogeneity is a lumping-together artifact of the measurement or an inherent intra-cell feature of the vesicles is an unresolved question. Recent empirical evidence will be provided for the quantal nature of intra-cell vesicle volume, supporting the controversial paradigm of homotypic fusion: basic cytoplasmic granules fuse with each other to create heterogeneously sized vesicles. An EM-algorithm-based method is presented for the conversion of multi-modal to quantal data that provides as by-product estimates of means and variances of basic granule packaging. Microsc. Res. Tech. 77:1-10, 2014.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Microscopy Research and Technique
Volume	77
Issue number	1
DOIs	https://doi.org/10.1002/jemt.22305
State	Published - Jan 2014

Keywords

EM algorithm
Multimodality
Stereology
Unit granule
Wicksell corpuscle problem

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Statistical analysis of the quantal basis of secretory granule formation

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Keywords

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