>d1heza2 b.1.1.2 (A:108-214) Immunoglobulin (constant domains of L and H chains) {Fab of human IgM RF 2A2} rtvaapsvfifppsdeqlksgtasvvcllnnfypreakvqwkvdnalqsgnsqesvteqd skdstyslsstltlskadyekhkvyacevthqglsspvtksfnrgec