4j39 A 1.7 BS01 rna B 0 P15 W17 W20 K38 Y51 Q85 I86 G87 S102 G103 G104 P12 W14 W17 K33 Y46 Q80 I81 G82 S97 G98 G99 ? 0044423 P69517 1 ~ 19 MTSPFKLPDESPSWTEWRLHNDETNQDNPLGFKESWGFGKVVFKRYLRYDRTEASLHRVLGSWTGDSVNYAASRFFGFDQIGCTYSIRFRGVSITVSGGSRTLQHLCEMAIRSKQELLQLAP