Tryptophan Hydroxylation: Measurement in Pineal Gland, Brainstem, and Carcinoid Tumor
- 13 January 1967
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 155 (3759) , 217-219
- https://doi.org/10.1126/science.155.3759.217
Abstract
Development of a rapid and sensitive radioassay has permitted study of the conversion of tryptophan to 5-hydroxytryptophan in mammalian tissues. Of normal tissues examined, beef and rat pineal gland contained the highest activity. This is the first direct demonstration of tryptophan hydroxylase in this hydroxyindole-rich tissue. Rat and rabbit brainstem and human carcinoid tumor also had quantities of enzyme that could be measured easily. The reaction requires a reduced pteridine and oxygen and is inhibired by Para-Chorophenylalanine.This publication has 14 references indexed in Scilit:
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