Temporal pattern of appearance and distribution of cholecystokinin-like peptides during development in Xenopus laevis.

Abstract

Cholecystokinin (CCK) radioimmunoassay and immunocytochemistry were used to localize the expression of CCK-like peptides in the gut, brain, and skin of Xenopus laevis during development from fertilization through metamorphosis to the adult form. CCK-like peptides were first detected in the gut shortly before food was first observed in the lumen of the… (More)

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