Nigrin b B chain The B chain is a galactose-specific lectin that facilitates the binding of nigrin b to the cell membrane that precedes endocytosis. Nigrin b Agglutinin V SNAV Nigrin b A chain MRVVAAAMLYFYIVVLAICSVGIQGIDYPSVSFNLDGAKSATYRDFLSNLRKTVATGTYEVNGLPVLRRESEVQVKSRFVLVPLTNYNGNTVTLAVDVTNLYVVAFSGNANSYFFKDATEVQKSNLFVGTKQNTLSFTGNYDNLETAANTRRESIELGPSPLDGAITSLYHGDSVARSLLVVIQMVSEAARFRYIEQEVRRSLQQATSFTPNALMLSMENNWSSMSLEIQQAGNNVSPFFGTVQLLNYDHTHRLVDNFEELYKITGIAILLFRCSSPSNDNAIRMPLDLAGEDNKYNDGETCTLRTSFTRNIVGRDGLCVDVRNGYDTDGTPLQLWPCGTQRNQRWTFDSDDTIRSMGKCMTANGLNNGSNIVIFNCSTAAENAIKWEVPIDGSIINPSSGLVMTAPRAASRTILLLEDNIYAASQGWTVTNNVKPIVASIVGYKEMCLQSNGENNGVWMEDCEATSLQQQWALYGDRTIRVNSTRGLCVTTNGYNSKDLIIILKCQGLPSQRWFFNSDGAIVNPKSRHVMDVRASNVSLREIIIFPATGNPNQQWVTQVLPS NIGB_SAMNI rRNA N-glycosidase 563 Non-toxic type 2 RIP which strongly inhibits mammalian protein synthesis but does not affect plant nor bacterial protein synthesis. The A chain is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits by removing adenine from position 4,324 of 28S rRNA.