title: A novel nuclear protein in rat ventral prostate. Androgen-dependent and age-related change.
abstract: A novel protein was found in the nuclei of rat ventral prostate. This protein has a molecular weight of about 21 kDa as measured by SDS-polyacrylamide gel electrophoresis. It showed a characteristic change between 3 and 84 weeks after birth in close association with the level of testosterone in the blood. After castration, the level of the 21-kDa protein decreased to 1/60 of normal in 7 days, but on daily injection of testosterone the level was restored to normal in 8 days and to twice the normal level in 14 days. Unlike H1 and H1(0) histone and high mobility group proteins, the 21-kDa protein was not extracted with 5% HClO4, but was partially extracted with 0.35 M NaCl. The 21-kDa protein was not found in kidney, liver, or bain, suggesting that it is specific to the ventral prostate.
mesh_terms: D000375:Aging; D000818:Animals; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism*; D004247:DNA / Q000378:metabolism; D006801:Humans; D008297:Male; D008970:Molecular Weight; D009698:Nucleoproteins / Q000302:isolation & purification / Q000378:metabolism*; D011467:Prostate / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D009698:Nucleoproteins; D013739:Testosterone; D004247:DNA