USP21 GI:74027267 ubiquitin-specific protease 21 1 mpqasehrlg rtreppvniq prvgsklpfa prarskerrn pasgpnpmlr 50 51 plpprpglpd erlkklelgr grtsgprprg plradhgvpl pgsppptval 100 101 plpsrtnlar sksvssgdlr pmgialgghr gtgelgaals rlalrpeppt 150 151 lrrstslrrl ggfpgpptlf sirteppash gsfhmisars sepfysddkm 200 201 ahhtlllgsg hvglrnlgnt cflnavlqcl sstrplrdfc lrrdfrqevp 250 251 gggraqelte afadvigalw hpdsceavnp trfravfqky vpsfsgysqq 300 301 daqeflkllm erlhleinrr grrappilan gpvpspprrg galleepels 350 351 dddranlmwk ryleredski vdlfvgqlks clkcqacgyr sttfevfcdl 400 401 slpipkkgfa ggkvslrdcf nlftkeeele senapvcdrc rqktrstkkl 450 451 tvqrfprilv lhlnrfsasr gsikkssvgv dfplqrlslg dfasdkagsp 500 501 vyqlyalcnh sgsvhyghyt alcrcqtgwh vyndsrvspv senqvasseg 550 551 yvlfyqlmqe pprcl