the beta-subunit of nerve growth factor ( 2.5 s ngf , mol . wt 13,500 ) which has a striking structural homology with proinsulin and has been reported to exert certain insulin-like metabolic effects in its own target tissues ( e.g . growing neurites and sympathetic ganglia ) , and the insulin-derived polypeptides , desalanine-insulin and desoctapeptide-insulin , as well as proinsulin , were examined for their effects on rat adipocytes , employing the technique of formate oxidation .
C0021641
insulin
C0033362
proinsulin