Studies of l-Cysteine Biosynthetic Enzymes in Phaseolus vulgaris L
AUTOR(ES)
Smith, Ivan K.
RESUMO
In higher plants the biosynthesis of l-cysteine from l-serine, acetylCoA, and sulfide requires serine transacetylase and O-acetylserine sulfhydrylase. The distribution of these enzymes in kidney bean (Phaseolus vulgaris L. cv. Red Kidney) seedlings was determined. Between one-third and two-thirds of the serine transacetylase activity was associated with mitochondria, whereas all of the O-acetyl-serine sulfhydrylase activity was present in the soluble fraction of cell homogenates. In a 14-day plant approximately two-thirds of the O-acetylserine sulfhydrylase activity and approximately one-half of the serine transacetylase activity was found in the leaves.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=366172Documentos Relacionados
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