Abstract：
:R*-cells of the digestive gland of Carcinus maenas have been investigated functionally and morphologically. A comparison of the capacity of separated cell suspensions to synthesize glycogen gave support to the hypothesis that R and R* cells belong to the same cell line. The unexpected observation of R* cells in gastric juice suggests that their release could represent a mode of redistribution of carbohydrate stores when the feeding activity of the crab is lower. Under electron microscopy, the calcospherites of R* cells appeared to be surrounded by multiple membranous layers, and displayed tubular and vesicular structures in their core. High glucose-6-phosphatase (G6Pase) activity in the subcellular fraction that is enriched in calcospherites suggests that these membranes are derived from the endoplasmic reticulum, via a process in which the enzyme plays a key role. We propose that this is the way by which the R cell differentiates into R* cell.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Loret SM,Devos PEdoi
10.1007/BF00318696keywords:
subject
Has Abstractpub_date
1992-01-01 00:00:00pages
105-11issue
1eissn
0302-766Xissn
1432-0878journal_volume
267pub_type
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journal_title：Cell and tissue research
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