beta-thionase -->
cystathionine beta-synthase
medical dictionary

<enzyme>

<cell biology> A multifunctional pyridoxal phosphate enzyme. In the second stage of cysteine biosynthesis it catalyses the reaction of homocysteine with serine to form cystathionine with the elimination of water.

Chemical name: L-Serine hydro-lyase (adding homocysteine)

Registry number: EC 4.2.1.22

(12 Dec 1998)