The amino acid sequences of the 46 latex ABC proteins were aligned using the MUSCLE program and subjected to phylogenetic analysis by the distance with neighbor-joining method using the MEGA5.05 software. The numbers on the nodes indicate the bootstrap values after 1000 replicates. The scale bar indicates the estimated number of amino acid substitutions per site. The HUGO nomenclature was followed and the ABC protein abbreviations are as follows: AOH: ABC1 homolog; ATH: ABC-two homolog; MDR: multi-drug resistance; ATM: ABC transporter of mitochondria; TAP: transporter associated with antigen processing; LLP: Lipid A-like exporter; MRP: multi-drug resistance-associated protein; PMP: peroxisomal membrane protein; RLI: RNase L inhibitor; GCN: general control non-repressible; WBC: white-brown complex; PDR: pleiotropic drug resistance; NAP: non-intrinsic ABC protein. AOH and ATH, which belong to the ABCA subfamily; MDR, TAP, ATM and LLP, which belong to the ABCB subfamily; MRP, which belongs to the ABCC subfamily; PMP, which belongs to the ABCD subfamily; RLI, which belongs to the ABCE subfamily; GCN, which belongs to the ABCF subfamily; WBC, which belongs to the ABCG subfamily and NAP, which belongs to the ABCI subfamily.