Neurohypophysial hormones of the 1-month-old bovine fetus: absence of vasotocin during mammal development |
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Authors: | Y Rouille B Levy M T Chauvet J Chauvet R Acher |
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Institution: | Laboratory of Biological Chemistry, University of Paris VI, France. |
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Abstract: | The neurohypophysial hormones of the 1-month-old bovine fetus have been identified by their positions in ion-exchange chromatography and their retention times in high-pressure reverse-phase partition chromatography. Arginine vasopressin and oxytocin have been recognized. The molar ratio vasopressin/oxytocin in neurohypophysis is about 6 in the 1-month-old fetus compared with 4 in the 3-month-old fetus, 2.7 in the 7-month-old fetus and 1 in the adult. Vasotocin is virtually absent even in the early fetus (less than 0.1% of arginine vasopressin). The occurrence of a vasotocin gene expressed in the fetus but silent in the adult appears unlikely. |
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