4.4.1.1	2-aminobut-2-enoate = 2-iminobutanoate	spontaneous	-	
4.4.1.1	2-iminobutanoate + H2O = 2-oxobutanoate + NH3	spontaneous	-	
4.4.1.1	L-cystathionine + H2O = L-cysteine + 2-oxobutanoate + NH3	mechanism	651351, 651810	
4.4.1.1	L-cystathionine + H2O = L-cysteine + 2-oxobutanoate + NH3	overall reaction	-	
4.4.1.1	L-cystathionine + H2O = L-cysteine + 2-oxobutanoate + NH3	the active site consists of two subsites. One recognizes the L-form of amino acids and the other shows affinity for thiol compounds with a carbonyl group	34489	
4.4.1.1	L-cystathionine = L-cysteine + 2-aminobut-2-enoate	(1a)	-