Amino acid alignment of dUTPases. The amino acid sequences from fowl adenovirus (S26429), Orf virus (Q9YYS0), human (G02777), vaccinia virus (P21035), Drosophila melanogaster (JC7565), Schizosaccharomyces pombe (Q9P6Q5), Arabidopsis (T12954), Saccharomyces cerevisiae (P33317), Caenorhabditis elegans (T43673), Escherichia coli (P06968), Pyrococcus furiosus (AAL47572), and PBCV-1 were aligned with the Wisconsin GCG PILEUP program. The five conserved motifs of dUTPases are labeled.