title: [Acid protease expression and regulation in the embryonic proventriculus of birds].
abstract: Normal embryonic proventriculi and the heterospecific recombinants of proventricular endoderm and mesenchyme were transplanted onto the chorio-allantoic membrane, and electrophoretic patterns of acid proteases in the explants were analyzed. The results demonstrated that the 6-day chick and 5-day quail proventricular endoderm produces acid proteases according to its own genetic information even under the influence of heterospecific mesenchyme, and that the production of acid proteases is regulated by some humoral factors of the hosts.
mesh_terms: D000818:Animals; D016282:Aspartic Acid Endopeptidases; D001717:Birds / Q000196:embryology*; D002642:Chick Embryo / Q000201:enzymology; D003370:Coturnix / Q000196:embryology; D010450:Endopeptidases / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation; D013278:Stomach, Avian / Q000196:embryology / Q000201:enzymology*
chemical_list: D010450:Endopeptidases; D016282:Aspartic Acid Endopeptidases
vernacular_title: L'expression de protéases acides et sa régulation dans le proventricule embryonnaire d'Oiseaux.