Absorption intestinale des protéines sous forme macromoléculaire et leur digestion chez la Truite arc-en-ciel. Étude ultrastructurale et biochimique en relation avec la première prise de nourriture

Autor:	U. Georgopoulou, Marie-France Sire, J.M. Vernier
Rok vydání:	1986
Předmět:	Cathepsin Ferritin biology Biochemistry biology.protein Ultrastructure Acid phosphatase Cathepsin D Animal Science and Zoology Digestion Horseradish peroxidase Ecology Evolution Behavior and Systematics Lysosomal proteases
Zdroj:	Canadian Journal of Zoology. 64:1231-1240
ISSN:	1480-3283 0008-4301
DOI:	10.1139/z86-183
Popis:	The epithelial cells of the posterior intestine of the rainbow trout differentiate some structures which, at the first feeding, allow the absorbtion of macromolecular proteins. After a transit across an apical tubulo-vesicular network, two marker proteins (horseradish peroxidase and ferritin) are segregated within an important supranuclear vacuolar system. The activities of a lysosomal protease (cathepsin) and of acid phosphatase increase strongly at the level of posterior intestine when the first feeding occurs. Juveniles can thus absorb and digest macromolecular proteins. Considering the important protein needs during this phase, this process can be of fundamental importance.
Databáze:	OpenAIRE
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