164 Involved in the synthesis of autoinducer 2 (AI-2) which is secreted by bacteria and is used to communicate both the cell density and the metabolic potential of the environment. The regulation of gene expression in response to changes in cell density is called quorum sensing. Catalyzes the transformation of S-ribosylhomocysteine (RHC) to homocysteine (HC) and 4,5- dihydroxy-2,3-pentadione (DPD) (By similarity). MAEETAEKPVVESFQLDHTKVKAPYVRYIDTETGPHGDVISNYDLRLTQPNKQAIPTGGLHTIEHTIAVLLRERIPGYIDCSPFGCRTGFHLLTWGTHPTEEVAKALKESLEFIAYKATWDDVPATTEKSCGNYRDHSLFTAKEWAKQILEEGISSDPFERKVV AI-2 synthesis protein BLD_0910 S-ribosylhomocysteine lyase Autoinducer-2 production protein LuxS luxS LUXS_BIFLD