Phylogenetic tree of HsABCB7 blast matches in prokaryotes. BLAST was used to determine the proteins in the prokaryote domain that were most similar to human ABCB7. The distance of tree results is shown above, with the lowest common scientific name listed in the figure. For branches that containing different species, the species are listed below, with the numbers corresponding to the superscript number in the figure. Interestingly, all species found are of the phylum Proteobacteria, and a large majority are of the class Alphaproteobacteria, which contains the family Rickettsiaceae, believed to be the bacteria that evolved into mitochondria in the endosymbiotic theory [17]. 1: Ferrovibrio sp., Rhodospirillaceae bacterium SYSU D60009.2: Candidatus Endolissoclinum sp. TMED26, Rhodospirillaceae bacterium TMED23.3: Rhodospirillales bacterium CG15_BIG_FIL_POS-T_REV_8_21_14_020_66_15], Alphaproteobacteria bacterium MarineAlpha3_Bin2], Alphaproteobacteria bacterium MarineAlpha3_Bin1, Alphaproteobacteria bacterium MarineAlpha3_Bin4. 4: Magnetospirillum sp. 64–120, Magnetospirillum gryphiswaldense, Magnetospirillum moscoviense, Phaeospirillum molischianum, Magnetospirillum sp. LBB-42, Magnetospirillum marisnigri, Magnetospirillum sp. ME-1, Magnetospirillum sp. XM-1.5: Skermanella stibiiresistens, Skermanella aerolata, Azospirillum sp. TSO35–2, Azospirillum sp. TSO22–1, Inquilinus limosus. 6: Serratia marcescens, Serratia, Serratia sp. Nf2, Enterobacterales, Klebsiella oxytoca, Serratia sp. TKO39, Serratia ureilytica. 7: Roseomonas gilardii, Roseomonas, Roseomonas mucosa, Roseomonas rosea, Roseomonas sp. CPCC 101021, Roseomonas aestuarii, Roseomonas rhizosphaerae, Roseomonas deserti, Acetobacteraceae bacterium AT-5844, Roseomonas, Belnapia moabensis, Belnapia rosea, Oceanibaculum nanhaiense, Oceanibaculum indicum. 8: Thalassospira sp., Thalassospira tepidiphila, Thalassospira profundimaris, Thalassospira mesophila, Thalassospira alkalitolerans. 9: Kiloniella laminariae, Kiloniella spongiae, Kiloniella majae, Kiloniella sp., Kiloniella litopenaei, Rhodospirillales bacterium 47_12_T64.10: Thermopetrobacter sp. TC1, Candidatus Phaeomarinobacter ectocarpi.