PHENYLALANINE AS SUBSTRATE FOR TYROSINE-HYDROXYLASE IN BOVINE ADRENAL CHROMAFFIN CELLS

被引:34
作者
FUKAMI, MH
HAAVIK, J
FLATMARK, T
机构
[1] Department of Biochemistry, University of Bergen
关键词
D O I
10.1042/bj2680525
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Incubation of bovine chromaffin cells with L-[14C]phenylalanine resulted in label accumulation in catecholamines at about 30% of the rate seen with L-tyrosine as precursor. Studies with purified tyrosine hydroxylase (EC 1.14.16.2) showed that the enzyme catalysed the hydroxylation of L-phenylalanine first to L-p-tyrosine and then to 3,4-dihydroxyphenylalanine (DOPA). No evidence for a significant involvement of an L-m-tyrosine intermediate in DOPA formation was found.
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页码:525 / 528
页数:4
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