PR:000001284 B- and T-lymphocyte attenuator B- and T-lymphocyte-associated protein|BTLA|CD272 has_part Pfam:PF00047 Immunoglobulin domain PIRSF:PIRSF038341 ISS PIRSF:PIRSF038341 PIRSF:PIRSF038341 20090326 PRO:CNA