Sequence Cluster id id2 desc organism isHeteromeric 1 Singleton1 TCDB::Q9L3M3 3.A.1.4.3 BraC, component of General L- (and D-)amino acid uptake porter (transports acidic, basic, polar, semipolar and hydrophobic amino acids). The amino and carboxyl groups do not need to be α since γ-aminobutyric acid (GABA) is a substrate. The system may function with additional binding proteins since L-alanine uptake is not dependent on BraC Rhizobium leguminosarum (biovar viciae) heteromer