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. 2018 Mar 2;13(3):e0193333. doi: 10.1371/journal.pone.0193333

Fig 3. X-ray crystal structure of the D41A/D42A mutant PCNA protein.

Fig 3

(A) Front and side views of the D41A/D42A mutant PCNA protein. All three subunits are colored light pink, and the locations of the substituted amino acid residues are shown in the sphere representation. (B) Close up of an overlay of the wild-type PCNA protein (light blue) and the D41A/D42A mutant PCNA protein (light pink) are shown in the ribbon representation (RMSD of 0.529 Å). The positions of the α carbons of residues 41 to 44 are indicated.