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O. ALTHABE Jr.
O. ALTHABE Jr.
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I. C. ARNT
I. C. ARNT
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L. A. BRANDA
L. A. BRANDA
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R. CALDEYRO-BARCIA
R. CALDEYRO-BARCIA
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SUMMARY
The milk-ejecting potencies of deamino-oxytocin and oxytocin were compared by means of recordings of intramammary pressure in lactating women.
No difference in milk-ejecting potency was found between the two peptides in one woman 16 months after delivery; at this time her blood did not inactivate either of the peptides.
In other women on the third day post partum, deamino-oxytocin was found to be 1·5 times as potent as oxytocin (w/w). At this stage, the blood of the patients inactivated oxytocin (half life: 10 min.) but not deamino-oxytocin; this effect accounts only in part for the difference in potency between the two peptides.
