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Neighbor-joining phylogenetic tree generated from an alignment of the nucleotide sequences (approximately 330 base pair segment) of the L1 gene from the 6 novel PV sequences identified in this study (designated novel CPV-A through F) and the most closely related CPVs. Bootstrap values were obtained from 100 resamplings of the data. Only bootstrap values >90% are shown. PV= papillomavirus; CPV= canine papillomavirus
