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(A) Fragment of binding interface of Archaeosine tRNA-Guanine Transglycosylase complexed with lambda-form tRNA (PDB: 1j2b). (B) Fragment of binding interface of PVUII Endonuclease complexed with cognate DNA (PDB: 3pvi). The side chains of the residues directly contributing to the electrostatic interactions or H-bonding are shown with balls and sticks. The protein and DNA/RNA are marked as blue and orange for comparison. The distance between the atom pairs are shown in Å.
