Figure 1From: A bioinformatic analysis of ribonucleotide reductase genes in phage genomes and metagenomesAn overview of the RNR classes detected in completely sequenced phage genomes. The number within parenthesis represents the number of phages containing one or more RNR genes belonging to that particular class or class combination, for a total of 128 phages with detectable RNR genes.Back to article page