4.2.1.22	L-serine + L-homocysteine = L-cystathionine + H2O	carbanion and aminacrylate intermediates in the CBS-catalyzed reaction, arrangement of the protein residues and pyridoxal 5'-phosphate cofactor in the active site pocket, and reaction mechanism, overview	716763	
4.2.1.22	L-serine + L-homocysteine = L-cystathionine + H2O	mechanism	650019, 650128, 650408, 652127, 652270	
4.2.1.22	L-serine + L-homocysteine = L-cystathionine + H2O	ping-pong mechanism	650238, 652551	
4.2.1.22	L-serine + L-homocysteine = L-cystathionine + H2O	sequential bisubstrate mechanism in which no product release occurs until both substrates are bound to the enzyme to form a ternary complex	5597