Arrangements of the orthologous genes of the FAD-binding oxidoreductase WP_048472120 and SAM-dependent methyltransferase WP_048472121 among microorganisms that produce medium branched-chain fatty acids (mBFAs). The orthologous genes of the FAD-binding oxidoreductase WP_048472120 and the SAM-dependent methyltransferase WP_048472121 were identified from the genomic sequences of Mycobacterium chlorophenolicum JCM 7439 (NZ_BCQY01000005), Rhodococcus ruber BKS 20-38 (NZ_AOEX01000025), Rhodococcus erythropolis R138 (NZ_CP007255), Rhodococcus qingshengii BKS 20-40 (NZ_AODN01000039), Nocardia donostiensis X 1654 (NZ_MUKP01000048), Mycobacterium tuberculosis H37Rv (NC_018143), Amycolatopsis orientalis DSM 40040 (NZ_ASJB01000001), Corynebacterium urealyticum ATCC 43042 (NC_010545), and Rhodococcus phenolicus DSM 44812 (NZ_LRRH01000116). The genes located near the orthologs of WP_048472121 were drawn schematically. The directions of the arrows indicate the orientation of transcription of the genes. The number “4” in the circle indicates the overlap of four base pairs between the two tandem genes. The group number in Table 1 is shown next to the name of strain. The accession number of each FAD-binding oxidoreductase and SAM-dependent methyltransferase is shown above the arrow indicating each gene. The percentage values indicate the identities of the protein sequences with WP_08472120 or WP_048472121. RecR, recombination protein; YE, YbaB/Ebf family (Jutras et al., 2012); ALA-A, N-acetylmuramoyl-L-alanine amidase; PCYC, polyketide cyclase; FADO, FAD-binding oxidoreductase; SAMM, SAM-dependent methyltransferase; MP, membrane protein; FOCS, fatty oxidation complex subunit α; P-KIN, protein kinase; SGNH-H, SGNH hydrolase; ALA-S, acetolactate synthase; CYC, cyclase; HAL-D, haloacid dehalogenase; U-GPM, UDP-galactopyranose mutase; CHO-T, choline transporter; HYPO, hypothetical protein; DPIII, DNA polymerase III.