"Blastokinin": Inducer and Regulator of Blastocyst Development in the Rabbit Uterus

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Science  27 Oct 1967:
Vol. 158, Issue 3800, pp. 490-492
DOI: 10.1126/science.158.3800.490


A protein fraction that induces blastulation of rabbit morula and stimulates blastocyst development has been isolated from the uterus of the rabbit at early pregnancy. Partial purification of this fraction indicates that the activity is restricted to a single homogeneous protein component. The term "blastokinin" is proposed to describe the compound.