Structure of chick progesterone receptors.
Oviduct progesterone receptors have been purified from both immature chicks and laying hens. The subunits, progestophilins A and B, have different molecular weights, but each is the same from either tissue source. Immunological data show that the subunits are cross-reactive. The hen B protein as isolated to homogeneity contains nonradioactive progesterone in stoichiometric amounts as shown by gas chromatography-mass spectrometry. These studies further confirm our earlier determinations on these proteins.
D000818:Animals; D000906:Antibodies; D002645:Chickens; D005260:Female; D008970:Molecular Weight; D010057:Oviducts / Q000378:metabolism; D011374:Progesterone / Q000378:metabolism; D011487:Protein Conformation; D011980:Receptors, Progesterone / Q000276:immunology / Q000302:isolation & purification* / Q000378:metabolism
D000906:Antibodies; D011980:Receptors, Progesterone; D011374:Progesterone