Li C H, Chung D, Yamashiro D
Proc Natl Acad Sci U S A. 1980 Dec;77(12):7214-7. doi: 10.1073/pnas.77.12.7214.
gamma-Lipotropin has been purified to homogeneity from human pituitary glands. It consists of 56 amino acids with one residue each of Trp, Thr, Val, Tyr, and Phe. The amino acid sequence has been determined as follows: H-Glu-Leu-Thr-Gly-Gln-Arg-Leu-Arg-Gln-Gly-Asp-Gly-Pro-Asn-Ala-Gly-Ala-Asp-Asp-G ly-Pro-Gly-Ala-Gln-Ala-Asp-Leu-Glu-His-Ser-Leu-Leu-Val-Ala-Ala-Glu-Lys-Lys-Asp- Glu-Gly-Pro-Tyr-Arg-Met-Glu-His-Phe-Arg-Trp-Gly-Ser-Pro-Pro-Lys-Asp-OH. Comparison with the structure of the ovine and porcine hormones reveals that the 23-amino-acid sequence at the COOH terminus is highly conserved in evolution.
γ-促脂素已从人垂体中纯化至同质。它由56个氨基酸组成,其中色氨酸、苏氨酸、缬氨酸、酪氨酸和苯丙氨酸各有一个残基。氨基酸序列已确定如下:H-谷氨酸-亮氨酸-苏氨酸-甘氨酸-谷氨酰胺-精氨酸-亮氨酸-精氨酸-谷氨酰胺-甘氨酸-天冬氨酸-甘氨酸-脯氨酸-天冬酰胺-丙氨酸-甘氨酸-丙氨酸-天冬氨酸-天冬氨酸-甘氨酸-脯氨酸-甘氨酸-丙氨酸-谷氨酰胺-丙氨酸-天冬氨酸-亮氨酸-谷氨酸-组氨酸-丝氨酸-亮氨酸-亮氨酸-缬氨酸-丙氨酸-丙氨酸-谷氨酸-赖氨酸-赖氨酸-天冬氨酸-谷氨酸-甘氨酸-脯氨酸-酪氨酸-精氨酸-甲硫氨酸-谷氨酸-组氨酸-苯丙氨酸-精氨酸-色氨酸-甘氨酸-丝氨酸-脯氨酸-脯氨酸-赖氨酸-天冬氨酸-OH。与绵羊和猪激素的结构比较表明,COOH末端的23个氨基酸序列在进化过程中高度保守。