4.2.1.22	heme	-	649869, 649888, 649914, 650105, 650154, 652551, 652695, 681230, 697850, 698157, 701064, 701929, 704974, 713958, 714071, 715172, 729799	
4.2.1.22	heme	2 mol per mol of tetrameric enzyme	5601, 5602	
4.2.1.22	heme	b-type heme	650096	
4.2.1.22	heme	carbon monoxide or nitric oxide can bind to the cofactor, resulting in enzyme inhibition	680641	
4.2.1.22	heme	CO binding displaces Cys52 from the heme	704177	
4.2.1.22	heme	cystathionine beta-synthase binds one mole of heme per subunit	677837	
4.2.1.22	heme	dependent	652694	
4.2.1.22	heme	enzyme possesses a noncatalytic heme cofactor with cysteine and histidine as ligands. Nitrite is reduced by Fe(II)-CBS to form Fe(II)NO radical-CBS. Reoxidation of Fe(II)NO radical-CBS by O2 shows complex kinetic behavior and leads to peroxynitrite (ONOO-) formation	748214	
4.2.1.22	heme	ferrous CBS can form a complex with isonitriles	649570	
4.2.1.22	heme	ferruous CBS can form a complex with isonitriles	649570