4.4.1.13 cysteine-S-conjugate beta-lyase; cysteine conjugate beta-lyase; glutamine transaminase K/cysteine conjugate beta-lyase; L-cysteine-S-conjugate thiol-lyase (deaminating); cystathionine beta-lyase; beta-cystathionase; cystine lyase; cystathionine L-ho • • •