Pronunciation: sis'ta-thi'o-nen sin'thas
Definition: An enzyme catalyzing the reversible hydrolysis of l-cystathionine to l-serine and l-homocysteine. A step in cysteine biosynthesis and in methionine catabolism. A deficiency of this enzyme leads to vascular thrombosis, dislocation of ocular lens, and abnormal development.
Synonym(s): ß-thionase, cysteine synthase, serine sulfhydrase
See Also: cystathionine ?-synthase
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