title: Yolk sac endoderm: exclusive site of serum protein synthesis in the early chick embryo.
mesh_terms: D000818:Animals; D001798:Blood Proteins / Q000096:biosynthesis*; D002642:Chick Embryo / Q000378:metabolism*; D004475:Ectoderm / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004707:Endoderm / Q000378:metabolism*; D008648:Mesoderm / Q000378:metabolism; D015017:Yolk Sac / Q000378:metabolism*
chemical_list: D001798:Blood Proteins