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Developmental regulation of phenylalanine hydroxylase activity inDrosophila melanogaster

โœ Scribed by John E. Geltosky; Herschel K. Mitchell

Publisher
Springer
Year
1980
Tongue
English
Weight
553 KB
Volume
18
Category
Article
ISSN
0006-2928

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โœฆ Synopsis

Herein we demonstrate that Drosophila larvae possess a synthetic activity capable of converting phenylalanine to tyrosine. This system is readily extractable and displays many characteristics of phenylalanine hydroxylase systems described in other organisms, the most notable being that a tetrahydropteridine is required for full expression of activity. The level of phenylalanine hydroxylase activity present in the organism varies with the stage of development: from an undetected level of activity at the first larval instar, there is a rapid increase in phenylalanine hydroxylase activity which reaches a peak at the time of puparium formation, after which there is a rapid decrease again to an undetected level.

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