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. Author manuscript; available in PMC: 2010 Jul 17.
Published in final edited form as: J Mol Biol. 2009 May 23;390(3):368–379. doi: 10.1016/j.jmb.2009.05.037

Figure 9.

Figure 9

Conservation of positively charged residues involved in stabilizing the triphosphate moiety and/or the pyrophosphate product. Based upon X-ray crystal structural analysis, amino acid residues within 4.0 Å of the triphosphate moiety (red) were identified. Amino acid sequences of selected (A) A-family, (B) B-family, (C) X-family, and (D) Y-family DNA polymerases were aligned using ClustalW2. Conserved residues are shaded in blue and the conserved catalytic aspartic acid residues are shaded in green.