a sulfated secretory protein ( apparent molecular weight approximately 70 000 ; isoelectric point approximately 4.8 ) recently identified as a minor component of mammotroph granules [ 21 ] has been purified , by ion-exchange chromatography on deae-sephadex followed by preparative slab gel electrophoresis , from homogenates of bovine anterior pituitary glands pulse-labeled with [ 35s ] sulfate .
C1517714
mammotroph
C0032008
anterior pituitary glands