Phylogenetic tree of all OC1 consensus sequences characterized to date. The tree is based on an alignment of 3318 nucleotides. Only bootstrap values greater than 50 are shown. OC1 sequences other than OC1_Das are taken from Gilbert et al. (2010). Old World, New World, and Australian OC1 sequences are in blue, green and red, respectively. NA = non-autonomous OC1; Auto = Autonomous OC1.