Abstract
Dilute acid extracts of lyophilized pituitary tissue obtained from rats of the Long-Evans and Wistar strains, 4 through 7 days old, were able to deplete the adrenal ascorbic acid content of hypophysectomized, male, Sprague-Dawley rats, 125-150 g in weight. A qualitatively similar response was observed when such extracts were injected intr-peritoneally into 4 through 7 day old rats of the Long-Evans and Wistar strains. Comparative assays against the U.S.P. standard corticotropin indicate a concentration of the adrenal ascorbic acid-depleting moiety equivalent to about 3 milliunits (U.S.P.) in the average pituitary gland of rats from this age group.

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