Fig 2. Structures of ssRNA-protein test-cases complexes.

(A) Crystallographic structure of the human sex-lethal protein bound to a 5'-U8 ssRNA, PDB ID 1B7F. (B): Crystallographic structure of the polyA-binding protein bound to a 5'-A8 ssRNA, PDB ID 1CVJ. The protein is represented in gray cartoon, the RNA in stick colored as rainbow from blue (5', frag1) to red (3', frag6). The nucleotides discarded for docking experiments are colored in white.