alpha-1 antitrypsin-related protein serpin A2 ATR serine (or cysteine) proteinase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 2 AAT-related protein alpha-1-antitrypsin-related protein ARGS serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 2, pseudogene PIL SERPINA2P psiATR putative alpha-1-antitrypsin-related protein