>d1deef2 b.1.1.2 (F:2622-2723) Immunoglobulin (constant domains of L and H chains) {Fab of human IgM RF 2A2} gsasaptlfplvscensnpsstvavgclaqdflpdsitfswkyknnsdisstrgfpsvlr ggkyaatsqvllpskdvaqgtnehvvckvqhpngnkekdvpl