Fig. 1.

SSB can bind to single stranded RNA. (A) Representative EMSA showing qualitative association of SSB with a 70 base ribonucleotide substrate. Bound species are depicted by *. (B) Tryptophan quenching monitored while titrating ssDNA (red circles) or ssRNA (blue triangles). The curves were fitted as described in the methods. Errors bars represent SEM. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)