Abstract
Prostatic binding protein (PBP) is a quantitatively important steroid-binding protein present in rat ventral prostate. Electrophoresis on SDS-containing polyacrylamide gels shows that PBP is composed of two subunits, F and S having molecular weights of 16,000 and 18,000. Upon reduction these subunits dissociate further into smaller components. Translation of mRNA from rat ventral prostate in a wheat germ cell-free system or in Xenopus oocytes results in the formation of polypeptides immunoprecipitable with an anti-PBP antiserum. However, as opposed to the wheat germ system, only the oocytes synthesize polypeptides, that are electrophoretically identical to those of native cytosolic PBP.
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