USF1 GI:46877102 upstream stimulatory factor 1 isoform 2 1 myrviqvseg qldgqtegtg aisgypatqs mtqaviqgaf tsddavdteg 50 51 taaethytyf pstavgdgag gttsgstaav vttqgseall gqatppgtgq 100 101 ffvmmspqev lqggsqrsia prthpyspks eaprttrdek rraqhnever 150 151 rrrdkinnwi vqlskiipdc smestksgqs kggilskacd yiqelrqsnh 200 201 rlseelqgld qlqldndvlr qqvedlknkn lllraqlrhh glevviknds 250 251 n