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Homology model of p25. Residues 1–59 are colored blue, the predicted cleavage site of p25 located between residues 60–68 is colored gray, residues 69–229 are colored green. The NAD+ molecule is shown in yellow. The illustration was prepared with the program MOLMOL, version 2k.2 (Koradi et al. 1996) and the POV-Ray rendering program (http://www.povray.org).
