morphine-like substances exist in brain or the pituitary of various species. beta-lipotropin (beta-lph) was found to contain within its c-terminal sequence the primary structure of these peptides.identity between the sequence of isolated fragments and thecarboxy terminal portion of the corresponding beta-lipotropins hasalso been observed in human and in porcine pituitary and hypothalamic-neurohypophysis extracts.1. bradbury, a.f., smyth, d.g. and snell, c.r. (1976), biochem. biophys. res. commun. 6!j, 950-956.2. ling, n., burgus, r. and guillemin, r. (1976). proc. natl. acad. sci. usa., 73, 3942-3946.
