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Global ORF cluster synteny of ΦM9 with selected T4 superfamily phages, showing T4 core protein ORFs. Also shown are Rhizobium phage P10VF, S. meliloti phage ΦM12, Caulobacter phage Cr30, and phage T4. The genomes have been positioned so that the sequence begins with the reverse complement of the gp41 ORF, which encodes a DNA primase/helicase.
