Sequence alignments of VioAD7, VioAO7, and other reported sugar aminotransferases. Multiple alignments were performed with the Clustal W program using the BioEdit sequence alignment software. The GenBank accession numbers for StsC_Sgr, TbmB_Ste, FdtB_Ath, GnnB_Afe, TylB_Sfr, ArnB_Eco, Cj1121c_Cje, Cj1294_Cje, RfbE_Vch, WecE_Eco, VioA_Sdy, and VioA_Eco are CAA70012, Q2MF17, AAS55722, AAS48422, S49052, AAM92146, CAL35238, AAT12282, CAA42137, AAC76796, AAR97958, and AAD44154, respectively. Four motifs are boxed. Sgr, Streptomyces griseus; Ste, Streptomyces tenebrarius; Ath, Aneurinibacillus thermoaerophilus; Afe, Acidithiobacillus ferrooxidans; Sfr, Streptomyces fradiae; Eco, Escherichia coli; Cje, Campylobacter jejuni; Vch, Vibrio cholerae; Sdy, Shigella dysenteriae.