IGJ GI:21489959 immunoglobulin J chain 1 mknhllfwgv lavfikavhv kaqederivl vdnkckcari tsriirssed 50 51 pnediverni riivplnnre nisdptsplr trfvyhlsdl ckkcdpteve 100 101 ldnqivtatq snicdedsat etcytydrnk cytavvplvy ggetkmveta 150 151 ltpdacypd