2gxb A 2.25 BS01 rna E 0 K170 N173 R174 Y177 T191 P192 P193 K34 N37 R38 Y41 T55 P56 P57 3.5.4.37 0003723,0003726 P55265 17437712 0 ~ 6 SHMEQRILKFLEELGEGKATTAHDLSGKLGTPKKEINRVLYSLAKKGKLQKEAGTPPLWKIA