caa a22 4500 469082429 CHVBK 20180323132954.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF00318696 doi (NATIONALLICENCE)springer-10.1007/BF00318696 Structure and possible functions of the calcospherite-rich cells (R* cells) in the digestive gland of the shore crab CArcinus maenas [Elektronische Daten] [Suzanne Loret, Pierre Devos] Summary: 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. Springer-Verlag, 1992 Calcospherite nationallicence Cell isolation nationallicence Hepatopancreas nationallicence Glucose-6-phosphatase nationallicence Carcinus maenas (Crustacea) nationallicence Loret Suzanne Laboratoire d' Endocrinologie et Hématologie Comparées, Département de Biologie, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, B-5000, Namur, Belgium aut Devos Pierre Laboratoire d' Endocrinologie et Hématologie Comparées, Département de Biologie, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, B-5000, Namur, Belgium aut Cell and Tissue Research Springer-Verlag 267/1(1992-01-01), 105-111 0302-766X 267:1<105 1992 267 441 https://doi.org/10.1007/BF00318696 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00318696 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Loret Suzanne Laboratoire d' Endocrinologie et Hématologie Comparées, Département de Biologie, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, B-5000, Namur, Belgium aut NATIONALLICENCE 700 1- Devos Pierre Laboratoire d' Endocrinologie et Hématologie Comparées, Département de Biologie, Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, B-5000, Namur, Belgium aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 267/1(1992-01-01), 105-111 0302-766X 267:1<105 1992 267 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer