Figure 7. ESI-MS full-scan spectra of fsRNA2 (R2, MW, 5423 Da) (5 µM) and its mixtures with 50 µM Kae and Dai.

(A) RNA alone; (B) with Kae; (C) with Dai; (D) with 7-hydroxyflavone. The solution was prepared as described above. fsRNA2 alone, and 1∶1, 2∶1, 3∶1, 4∶1 and 5∶1 complexes are indicated.