4v5h B1 5.8 BS01 rna BB 0 K2 Q39 S40 H41 L43 K44 R47 A51 R52 K54 T55 E59 K2 Q39 S40 H41 L43 K44 R47 A51 R52 K54 T55 E59 ? 0000027,0002181,0003735,0005737,0005840,0006412,0019843,0022625,1990904 P0A7M6 19933110 1 ~ 2903 MKAKELREKSVEELNTELLNLLREQFNLRMQAASGQLQQSHLLKQVRRDVARVKTLLNEKAGA