cysteine sulfinic acid

cys·te·ine sul·fin·ic ac·id

(sis-tē'ēn sul-fin'ik as'id),
A natural oxidation product of cysteine; an intermediate in the formation of taurine (using cysteic acid).
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However, as the activities of cysteine dioxygenase (CD) and cysteine sulfinic acid decarboxylase (CSAD), which are enzymes involved in taurine synthesis, are too low to trigger taurine biosynthesis in the human body (Rigo and Senterre, 1977; Sturman and Hayes, 1980), taurine must be supplied by outside sources.
The major pathway is Cys oxidization into cysteine sulfinic acid, decarbonization into hypotaurine, and finally oxidization into taurine.
However, as the activities of cysteine dioxygenase (CD) and cysteine sulfinic acid decarboxylase (CSAD) which are enzymes involving in taurine synthesis are too low to trigger taurine biosynthesis in the human body (Rigo and Senterre, 1977; Sturman and Hayes, 1980), taurine should be supplied from outside.
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