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. 2006 May 10;34(9):2528–2535. doi: 10.1093/nar/gkl300

Figure 1.

Figure 1

Exonuclease active site of T4 DNA polymerase (21) (PDB: 1NOY). The structure of the exonuclease active site is shown with the four conserved catalytic residues. The two divalent metal ions are shown as spheres. Inter-atomic distances <3.5 Å are shown as red, dashed lines and those >3.5 Å are shown in blue. This figure was made with PyMOL (37).