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Science 24 January 1964:
Vol. 143. no. 3604, pp. 375 - 376
DOI: 10.1126/science.143.3604.375
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Articles

Circadian Periodicity in the Concentration of Prolactin in the Rat Hypophysis

Ray H. Clark 1 and Burton L. Baker 1

1 Department of Anatomy, University of Michigan, Ann Arbor

Prolactin activity in the hypophyses of rats maintained under standardized conditions was assayed in pigeons. The concentration of prolactin in the gland exhibited a circadian rhythm.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
DNA Synthesis in the Anterior Pituitary of the Male Rat: Effect of Castration and Photoperiod.
W. C. Hymer, A. Mastro, and E. Griswold (1970)
Science 167, 1629-1631
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Science. ISSN 0036-8075 (print), 1095-9203 (online)