FCGR2B GI:50511928 Fc fragment of IgG, low affinity IIb, receptor isoform 4 1 mgilsflpvl atesdwadck spqpwghmll wtavlflapv agtpappkav 50 51 lklepqwinv lqedsvtltc rgthspesds iqwfhngnli pthtqpsyrf 100 101 kannndsgey tcqtgqtsls dpvhltvlse wlvlqtphle fqegetivlr 150 151 chswkdkplv kvtffqngks kkfsrsdpnf sipqanhshs gdyhctgnig 200 201 ytlysskpvt itvqapsssp mgiivavvtg iavaaivaav valiycrkkr 250 251 isalpgypec remgetlpek panptnpdea dkvgaentit ysllmhpdal 300 301 eepddqnri