Phylogenetic trees comparing (A) TRAV, (B) TRAJ, and (C) TRBV genes expressed by pig (p), human (h), mouse (m), and rat (r) iNKT cells. Phylogenetic trees were constructed by the neighbor-joining method using nucleotide sequences from the current study compared to the following sources in the Genbank database; Homsap: TRAV10 (NC_000014.9), TRAJ18 (NC_000014.9), TRBV25-1 (NC_000007.14); Musmus (C57BL/6J): Trav11 (NC_000080.6), Traj18 (NC_000080.6), Trbv13-2 (NC_000072.6); Rattus-Norway rat: Trav14S1 (AB041999.1), Traj18 (DQ340291.1), Vβ8.2 (X14973.1).