acid extracts of rat anterior pituitary cells and cell-derived culture media were shown to contain three forms of beta-endorphin immunoreactive peptides , corresponding in molecular size to the prohormone pro-opiomelanocortin ( pomc ) , beta-lipotropin and 3.5 kda beta-endorphin , and essentially two forms of adrenocorticotropin ( acth ) immunoreactivity , representing a 20 kda intermediate fragment and 4.5 kda acth .
C0033195
pro-opiomelanocortin
C0023832
beta-lipotropin