APEX1 GI:18375501 APEX nuclease 1 1 mpkrgkkgav aedgdelrte peakksktaa kkndkeaage gpalyedppd 50 51 qktspsgkpa tlkicswnvd glrawikkkg ldwvkeeapd ilclqetkcs 100 101 enklpaelqe lpglshqyws apsdkegysg vgllsrqcpl kvsygigdee 150 151 hdqegrviva efdsfvlvta yvpnagrglv rleyrqrwde afrkflkgla 200 201 srkplvlcgd lnvaheeidl rnpkgnkkna gftpqerqgf gellqavpla 250 251 dsfrhlypnt pyaytfwtym mnarsknvgw rldyfllshs llpalcdski 300 301 rskalgsdhc pitlylal