A Na+/glucose symporter (SglT) has been identified in "Vibrio parahaemolyticus" (10). Sodium ions induced the cells’ uptake of glucose in a study of phosphotransferase-system (PTS) mutants (10). "Clostridium difficile" has a symporter homologous to that of the "V. parahaemolyticus" SglT (6). A citrate/Na+ symporter, CitS, seems to be common between "Vibrio cholerae", "Salmonella" Typhi, and "Klebsiella pneumoniae" (6). This symporter uses the influx of sodium ions in order to bring citrate into the cell, which is an important substrate to have for metabolic processes such as decarboxylation of oxaloacetate (6). A H+/amino acid symporter BrnQ can be found in "Lactobacillus delbruckii", and "Pseudomonas aeruginosa" has the BraB symporter for substrates such as glutamate as well (6).