Abstract
1. Following the i.v. administration of 3,4-dihydroxyphenylethylamine (dopamine) to sheep, 3,4-dihydroxyphenylethanol and 3,4-dihydroxyphenylacetic acid rapidly appeared in the blood. 2. 3,4-Dihydroxyphenylethanol can be formed from dopamine by blood plasma of ruminants in vitro. 3. It is suggested that this plasma enzyme system might serve to inactivate dopamine released from mast cells in ruminant species.
Published Version
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