Table 2.

Estimation of evolutionary distances of sequence pairs comprising T. japonicus NR1L subfamily members with other NR1 subfamilies: A) Genetic distance values among NR1I, NR1J, and all NR1L members

	in group	NR1I	NR1J	NR1L
NR1I	0.379		0.807	1.365
NR1J	0.479			1.328
NR1L1	1.063

¹Entire members of NR1L subfamilies.

Genetic distance is represented as the number of amino acid substitutions per site averaged over all sequence pairs between groups. Details of the calculations and parameters are provided in the Methods section. Raw results are appended as Additional file 1: Table S4. Gene information for NR1I, NR1J, and NR1L was collected from Caenorhabditis elegans (Ce), Ciona intestinalis (Ci), Danio rerio (Dr), Daphnia magna (Dma), Daphnia pulex (Dp), Drosophila melanogaster (Dm), Homo sapiens (Hs), Ixodes scapularis (Is), Schistosoma mansoni (Sm), Tigriopus californicus (Tc), and Xenopus laevis (Xl).