1.4.99.6 up expression of dauBAR is specifically induced by exogenous D-arginine and D-lysine 705583 1.4.99.6 up highly up-regulated by L-Ala and D-Ala, followed by L-Val, L-Trp, L-Ser, L-Thr, L-Lys, Gly, L-Cys and several L-amino acids. Expression requires a transcriptional regulator, DadR 748083