7uvz X 2.21 BS01 rna A 0 T3 R7 Q44 R47 K48 A51 R52 K54 T55 T58 T2 R6 Q43 R46 K47 A50 R51 K53 T54 T57 ? 0003735,0005840,0006412,0022625,1990904 B7IA31 37192172 9 ~ 2898 KTKDLREKSVEELKALLDEQQLNQFRLRMAKATGQLGKSHEVQVARKTIARIKTLLTEKQ