While confirming the long held view that “viruses do not closely imitate the use of the [host’s] ... codon catalogue” (Grantham et al., 1986), it is nevertheless considered a “surprising finding” that “despite having the ability to infect the same host, many mycobacteriophages share little or no genetic similarity” (i.e. similarity in their “GC contents and codon utilization patterns;” Esposito...