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Fig. 2. Phylogenetic tree of chordate COX homologues. Database searches were used
to find COX homologues in Fugu and Ciona. The tree was
constructed using the neighbor-joining method with Poisson-correction, and
numbers indicate bootstrap values for 1000 replicates. All homologues are
labeled by genus. GenBank accession numbers are, from top to bottom: COX1
– Homo (AAL33601), Mus (NP_032995), Gallus
(XP_425326), Danio (NP_705942), Onchorhynchus (CAC10360),
Salvelinus (AAF14529), Fugu 1a (FuguGenscan_21183),
Fugu 1b (FuguGenscan_4741); COX2 – Homo (BAA05698),
Mus (Q05769), Gallus (P27607), Danio (NP_705943),
Onchorhynchus (CAB46017), Salvelinus (AAD45896),
Fundulus (AAS21313), Fugu (FuguGenscan_3088); COXa –
Ciona (scaffold 118), COXb – Ciona (scaffold 207).
Scale bar represents 20% amino acid replacement per site.
