Cysteine Synthase from Rape Leaves

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Abstract
Cysteine synthase [O-Acetyl-L-serine acetate-lyase (adding hydrogen-sulfide) EC 4.2. 99.8] has been highly purified from the extract of rape, Brassica chinensis var. Koniatsuna. The purified preparation appeared to be homogeneous on Sephadex G 100 gel filtration and dodecylsulfate-polyacrylamide gel electrophoresis, showing a molecular weight of about 62,000. The latter method also suggested that this enzyme was composed of two identical subunits. The enzyme contained 2 moles of pyridoxal phosphate per mole of enzyme.

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