Figure 2From: Recognition of essential purines by the U1A proteinThe interaction of U1A and SL2 RNA. A. Diagram of the U1A-SL2 RNA complex from the X-ray cocrystal structure [16]. A1, G4, and A6 are displayed in green. Panels B, C, and D show an expanded view of the hydrogen bonding network involving A1, G4, and A6, respectively, in the cocrystal structure.Back to article page