Fig. 1

Phylogenetic tree of ABCA subfamily transporters. Amino acid sequences were aligned using ClustalX 1.83 and the multiple alignment was used to construct the phylogenetic tree using MEGA6 with 100 bootstrap replicates. The phylogenetic tree was constructed using a maximum likelihood method with the Jones–Taylor–Thornton (JTT) substitution model. The lamprey ABCA proteins are highlighted with red dots