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Yolk sac endoderm: exclusive site of serum protein synthesis in the early chick embryo

Journal Article · · Dev. Biol.; (United States)
In order to determine which cell type or types synthesized serum proteins, yolk sacs from 4-day chick embryos were manually separated into ectoderm, mesoderm, and endoderm and incubated in the presence of radioactive valine. Analysis of the incubation media by polyacrylamide gel electrophoresis as well as by immunoprecipitation showed that all serum proteins were synthesized exclusively by the cells of the endoderm. These included transferrin and three embryo-specific serum proteins: ..cap alpha..reverse arrowglobulin ..cap alpha..-globulin b, and prealbumin.
Research Organization:
Univ. of Connecticut, Storrs
OSTI ID:
6319119
Journal Information:
Dev. Biol.; (United States), Journal Name: Dev. Biol.; (United States) Vol. 75; ISSN DEBIA
Country of Publication:
United States
Language:
English