1.2.7.8	heterotetramer	2 * 67000 + 2 * 21000, SDS-PAGE	-, 725574	
1.2.7.8	tetramer	-	639362, 644701, 644703	
1.2.7.8	tetramer	2 * 66000 + 2 * 23000, alpha2,beta2, SDS-PAGE	639362, 644700	
1.2.7.8	tetramer	2 * 67000 + 2 * 23000, alpha2,beta2, SDS-PAGE	-, 644697	
1.2.7.8	tetramer	2 * 67000, alpha-subunit, plus 2 * 21000, beta-subunit, SDS-PAGE	-, 725574	
1.2.7.8	tetramer	2 * 71000 + 2 * 24000, alpha2,beta2, SDS-PAGE	639362, 644703