Figure 1From: Bioinformatic mapping of AlkB homology domains in virusesPSI-Blast search results shown as a Venn diagram. Initial searches using methyltransferase, helicase and RdRp domains retrieved 163, 175 and 237 sequences, respectively. A total of 146 sequences contained all three domains, and 22 of these also contained an AlkB domain.Back to article page