Phylogenetic relationship between CsMRP4 and members of the MRP/SUR/CFTR subfamily. Bootstrap values (1000 replicates) are shown next to the branches. Scale bar represents amino acid substitutions. UniProtKB/Swiss-Prot IDs for the ABCC subfamily are shown in parentheses. IDs for the ABCB subfamily are P-gp1 (P08183), ATP1 (Q03518), ATP2 (Q03519), P-gp3 (P21439), ABCB5 (Q2M3G0), MT-ABC3 (Q9NP58), ABC7 (O75027), M-ABC1 (Q9NUT2), TAPL (Q9NP78), M-ABC2 (Q9NRK6), and BSEP (O95342)