3.1.1.77	dimer	1 * 14000 + 1 * 52000, small subunit not required for activity	246552	
3.1.1.77	dimer	alpha, beta, 1 * 50000 + 1 * 14000-20000, disulfide linked	246546, 246549	
3.1.1.77	dimer	disufide linked hetrodimer	246554