>d1deed2 b.1.1.2 (D:1622-1723) Immunoglobulin (constant domains of L and H chains) {Fab of human IgM RF 2A2} gsasaptlfplvscensnpsstvavgclaqdflpdsitfswkyknnsdisstrgfpsvlr ggkyaatsqvllpskdvaqgtnehvvckvqhpngnkekdvpl