B-cell antigen receptor complex-associated protein beta chain (B-cell-specific glycoprotein B29) (Ig-beta) (Immunoglobulin-associated B29 protein) (CD antigen CD79b)
1_MARLA 6_ LSPVP 11_ SHWMV 16_ ALLLL 21_ LSAEP 26_ VPAAR 31_ SEDRY 36_ RNPKG 41_ SACSR 46_ IWQSP 51_ RFIAR 56_ KRGFT 61_ VKMHC 66_ YMNSA 71_ SGNVS 76_ WLWKQ 81_ EMDEN 86_ PQQLK 91_ LEKGR 96_ MEESQ 101_ NESLA 106_ TLTIQ 111_ GIRFE 116_ DNGIY 121_ FCQQK 126_ CNNTS 131_ EVYQG 136_ CGTEL 141_ RVMGF 146_ STLAQ 151_ LKQRN 156_ TLKDG 161_ IIMIQ 166_ TLLII 171_ LFIIV 176_ PIFLL 181_ LDKDD 186_ SKAGM 191_ EEDHT 196_ YEGLD 201_ IDQTA 206_ TYEDI 211_ VTLRT 216_ GEVKW 221_SVGEH
1: Required in cooperation with CD79A for initiation of the signal transduction cascade activated by the B-cell antigen receptor complex (BCR) which leads to internalization of the complex, trafficking to late endosomes and antigen presentation. Enhances phosphorylation of CD79A, possibly by recruiting kinases which phosphorylate CD79A or by recruiting proteins which bind to CD79A and protect it from dephosphorylation