Sequence and structural similarities between β clamps from <i>E. coli</i>, <i>S. aureus</i> and human.

<p>Left: Alignment of <i>S. aureus</i> DnaN, <i>E. coli</i> DnaN and human PCNA protein sequences using vector NTI deluxe v. 9.0 (Informax Inc.). Yellow: Identical residues in all three species. Blue: Identical residues in two of the three species. Amino acids that are similar in two of the three species are in green. Right: Structure prediction of the same proteins made by the SAM-T08 server (<a href="http://compbio.soe.ucsc.edu/papers/sam_doc/sam_doc.html" target="_blank">http://compbio.soe.ucsc.edu/papers/sam_doc/sam_doc.html</a>).