4u25 AU 2.9 BS01 rna AA 0 R18 R21 E36 Y38 E39 K49 R15 R18 E33 Y35 E36 K46 ? 0003735,0005840,0006412 P68679 24957822 2 ~ 1539 IKVRENEPFDVALRRFKRSCEKAGVLAEVRRREFYEKPTTERKRAKASAVK