[ 3h ] trh bound specifically to cellular membranes from 11 of 12 such adenomas studied , with a dissociation constant ( kd ) of 50 +/- 5 ( +/- sem ) nmol/l and a maximum number of binding sites of 76 +/- 16 fmol/mg membrane protein ( range , 32-229 fmol/mg protein ) .
C0025252
membrane
C0033684
protein