A heptacosapeptide (known as γ3-MSH) which is located within the amino acid sequence of bovine corticotropin-β-lipotropin precursor protein was synthesized by fragment condensation of Z-(1-12)-OSu and H-(13-27)-OBzl followed by deprotection with trifluoromethanesulfonic acid-thioanisole in TFA. The synthetic peptide exhibited weak melanocyte-stimulating activity (1.5×106 U/g, in vitro).
通过 Z-(1-12)-OSu 和 H-(13-27)-OBzl 的片段缩合,然后在反式
脂肪酸中用
三氟甲磺酸-
硫代
苯甲醚进行脱保护,合成了位于牛促
肾上腺皮质激素-β-促脂腺激素前体蛋白
氨基酸序列内的七肽 (称为 γ3-MSH)。合成肽具有微弱的
黑色素细胞刺激活性(体外 1.5×106 U/g)。