PR:000001848 butyrophilin fam:BTN has_part Pfam:PF07686 Immunoglobulin V-set domain 20090326 PRO:CNA PR:000001848 butyrophilin fam:BTN has_part Pfam:PF00622 SPRY domain 20090326 PRO:CNA PR:000001848 butyrophilin fam:BTN has_part Pfam:PF08205 CD80-like C2-set immunoglobulin domain 20090326 PRO:CNA