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Multiple-sequence alignment of 20 alphaherpesvirus-encoded UL37 proteins. A sequence alignment of the UL37 protein from 20 different alphaherpesviruses encompassing the amino-terminal half of UL37 corresponding to the portion of PRV UL37 with a published crystal structure (38) is shown. Amino acid residues are colored according to their side chain chemistry. Red arrowheads indicate the highly conserved residues that were mutated to alanines.
