Cysteine sulfinic acid decarboxylase (CSAD) catalyses the penultimate and rate limiting step of taurine synthesis. Taurine is an amino sulphonic acid and is one of the most abundant amino acids in the brain. It has been found to be essential to a number of biological processes such as development of the brain and eye, reproduction, diabetes, osmoregulation as well as the anti-inflammatory activity of leukocytes.Synonyms: CSD, Cysteine sulfinic acid decarboxylase, Cysteine-sulfinate decarboxylase, Sulfinoalanine decarboxylase