Peptides Containing The Sequence (tyr-gly-gly-phe-met-thr-ser- Glu Lys-ser-gln- Thr-pro-leu-val-thr-oh), E.g., Lipotropin Or Related Peptides (fragments Which Are Common With Digest 720 Are Also In That Classification) (c07k-99/66) Patents (Class 930/DIG730)