our earlier binding studies of the 22000- and 20000-mr variants of human growth hormone ( somatotropin ) to pregnant-rabbit liver and mammary receptors [ closset , smal , gomez & hennen ( 1983 ) biochem . j . 214 , 885-892 ] suggested that the 20000-mr variant was a lower-affinity analogue of the 22000-mr molecule .
C0169964
human growth
C0037663
somatotropin