#American #biochemist who was awarded the #NobelPrize for Chemistry in 1955 for his work on bioch…

#American #biochemist who was awarded the #NobelPrize for Chemistry in 1955 for his work on biochemically important #sulphur #compounds, especially for the first #synthesis of a #polypeptide #hormone.

Underneath the #brain, the #pituitarygland is well-protected and, in man about as big as a bean. It secretes several hormones, that is, substances which regulate important #physiological #functions. These are built up from #aminoacids in the same way as #proteins, but with a far lower molecular weight. #Vigneaud #isolated and synthesized two #pituitary hormones: #vasopressin, which acts on the #muscles of the #bloodvessels to cause elevation of #bloodpressure; and #oxytocin, the principal agent causing contraction of the #uterus and secretion of #milk.

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