2az0 B 2.6 BS01 rna C 0 N33 R36 D37 R54 M55 S58 N32 R35 D36 R53 M54 S57 ? Kd=1.4nM P68831 16228003 1 ~ 18 PSKLALIQELPDRIQTAVEAAMGMSYQDAPNNVRRDLDNLHACLNKAKLTVSRMVTSLLEKPSVVAYLEGK 2az0 B 2.6 BS02 rna D 0 N40 C44 K47 K62 P63 N39 C43 K46 K61 P62 ? Kd=1.4nM P68831 16228003 1 ~ 18 PSKLALIQELPDRIQTAVEAAMGMSYQDAPNNVRRDLDNLHACLNKAKLTVSRMVTSLLEKPSVVAYLEGK