title: Identification of a less immunoreactive form of prolactin in the rat pituitary.
abstract: Disc electrophoretic analysis of prolactin (PRL) in the rat pituitary is usually performed using a 7.5% concentration of acrylamide gel. Re-electrophoresis of the eluate of the PRL band from such a gel on polyacrylamides of serially increasing concentrations revealed that the PRL band of 7.5% gel actually contains at least two additional proteins. One of these, whose apparent mol. wt. is 31,000, has significant pigeon crop-sac stimulating activity but very little or no cross-reactivity in a RIA for rat PRL. It also has a rapid turnover rate in short-term in vitro incubations. This newly-found protein seems to be a nonimmunoreactive molecular variant of rat PRL.
mesh_terms: D000818:Animals; D010856:Columbidae; D003429:Cross Reactions; D051379:Mice; D008970:Molecular Weight; D010902:Pituitary Gland / Q000032:analysis*; D011388:Prolactin / Q000032:analysis* / Q000276:immunology; D011863:Radioimmunoassay; D051381:Rats
chemical_list: D011388:Prolactin