the levels of seven peptides ( corticotropin releasing factor , adrenocorticotropin , vasoactive intestinal peptide , somatostatin , beta-endorphin , beta-lipotropin , and the n-terminal fragment of proopiomelanocortin ) were highly , positively correlated with one another .
C0023832
beta-lipotropin
C0033195
proopiomelanocortin