Term Name:	cystathionine gamma-lyase activity
Synonyms:	gamma-cystathionase activity, homoserine deaminase activity, homoserine deaminase-cystathionase activity, homoserine dehydratase activity, L-cystathionine cysteine-lyase (deaminating), L-cystathionine cysteine-lyase (deaminating; 2-oxobutanoate-forming)
Definition:	Catalysis of the reaction: L-cystathionine + H2O = 2-oxobutanoate + L-cysteine + NH4+.
Ontology:	GO: Molecular Function [GO:0004123]    QuickGO    AmiGO