>d1dn0d2 b.1.1.2 (D:121-225) Immunoglobulin heavy chain mu constant domain 1, CH1-mu {Human (Homo sapiens)} gsasaptlfplvscsvavgclaqdflpdsitfswkyknnsdisstrgfpsvlrggkyaat sqvllpskdvmagtdehvvckvqhpngnkeknvplpv