Tryptophan Hydroxylation: Measurement in Pineal Gland, Brainstem, and Carcinoid Tumor
Tóm tắt
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 inhibited by para-chlorophenylalanine.
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Tài liệu tham khảo
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