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英《新科学家》第88卷第1228期(1980年)报道:近年来在脑和其他组织中发现的大蛋白分子神经多肽引起了广大的兴趣,这种多肽可能作为天然的药物治疗各种疾病。这些多肽中有些具有吗啡样作用,并能作为体内的天然镇痛剂。这些就是脑啡肽和内啡肽。在1975年分离出两种脑啡肽,甲硫-脑啡肽和亮-脑啡肽,而一般认为只有这两种脑啡肽。但在法国和美国新近的研究似乎又发现了一个第三种脑啡肽。这个新的分子的名称很繁琐,叫做甲硫-脑啡肽-精~6-苯丙~7,是于1979年由美国新泽西
The New Scientist, Vol. 88, No. 1228 (1980) reports that there has been a great deal of interest in the discovery of large protein molecular neuropeptides in the brain and other tissues in recent years. This polypeptide may serve as a natural medicine for the treatment of various diseases . Some of these peptides have morphine-like effects and act as natural painkillers in the body. These are enkephalin and endorphin. In 1975, two enkephalin, methylthio-enkephalin and enkephalin were isolated, whereas only two enkephalins were considered. However, recent studies in France and the United States seem to have found a third enkephalin. The name of this new molecule is very tedious, called methylthio-enkephalin - fine ~ 6-phenylpropan-7, was the United States in New Jersey in 1979