incorporation of [ 3h ] phenylalanine into isolated intermediate/posterior pituitaries in vitro revealed a reduction in the amount of label incorporated into the beta-endorphin/acth precursor to a similar extent ( about 45 % ) , but essentially no effect on the conversion of the precursor into beta-lipotropin and beta-endorphin .
C0033195
endorphin/acth precursor
C0023832
beta-lipotropin