TREX2 GI:63079718 three prime repair exonuclease 2 1 mseapraetf vfldleatgl psvepeiael slfavhrssl enpehdesga 50 51 lvlprvldkl tlcmcperpf takaseitgl sseglarcrk agfdgavvrt 100 101 lqaflsrqag piclvahngf dydfpllcae lrrlgarlpr dtvcldtlpa 150 151 lrgldrahsh gtrargrqgy slgslfhryf raepsaahsa egdvhtllli 200 201 flhraaella wadeqargwa hiepmylppd dpslea