2xnr A 1.6 BS01 rna C 0 R331 F333 N361 K363 F366 F368 I395 E397 S399 S400 S401 R4 F6 N34 K36 F39 F41 I68 E70 S72 S73 S74 ? 0003676,0003723 Kd=110uM P38996 20805243 0 ~ 4 MKSRLFIGNLPLKNVSKEDLFRIFSPYGHIMQINIKNAFGFIQFDNPQSVRDAIECESQEMNFGKKLILEVSSSN