| [B] Cryptobacterium curtum (strain ATCC 700683 / DSM 15641 / 12-3) | CRYCD01059 | C7MPF8 | LuxS protein involved in autoinducer AI2 synthesis |
| [B] Bacteroides vulgatus (strain ATCC 8482 / DSM 1447 / NCTC 11154) | BACV800818 | LUXS_BACV8 | Autoinducer-2 production protein LuxS |
| [B] Porphyromonas gingivalis | PORGI00419 | LUXS_PORGI | S-ribosylhomocysteine lyase |
| [B] Porphyromonas gingivalis (strain ATCC 33277 / DSM 20709 / JCM 12257) | PORG301405 | LUXS_PORG3 | Putative autoinducer-2 production protein LuxS |
| [B] Capnocytophaga ochracea (strain ATCC 27872 / DSM 7271 / JCM 12966 / VPI 2845) | CAPOD01199 | C7M4X6 | Quorum-sensing autoinducer 2 (AI-2), LuxS |
| [B] Clostridium acetobutylicum | CLOAB02897 | LUXS_CLOAB | S-ribosylhomocysteine lyase |
| [B] Clostridium beijerinckii (strain ATCC 51743 / NCIMB 8052) | CLOB801223 | LUXS_CLOB8 | Quorum-sensing autoinducer 2 (AI-2), LuxS |
| [B] Clostridium botulinum (strain Alaska E43 / type E3) | CLOBA02495 | LUXS_CLOBA | S-ribosylhomocysteinase LuxS |
| [B] Clostridium kluyveri (strain ATCC 8527 / DSM 555 / NCIMB 10680) | CLOK501503 | A5N8G9 | S-ribosylhomocysteine lyase-related protein |
| [B] Clostridium phytofermentans (strain ATCC 700394 / DSM 18823 / ISDg) | CLOPH00881 | A9KLE6 | Quorum-sensing autoinducer 2 (AI-2), LuxS |
| [B] Finegoldia magna (strain ATCC 29328) | FINM200716 | LUXS_FINM2 | Autoinducer-2 production protein |
| [B] Eubacterium eligens (strain ATCC 27750 / VPI C15-48) | EUBE201777 | C4Z400 | S-ribosylhomocysteine lyase |
| [B] Lactobacillus delbrueckii subsp. bulgaricus (strain ATCC 11842 / DSM 20081) | LACDA00100 | LUXS_LACDA | S-ribosylhomocysteinase (Autoinducer-2 production protein LuxS) (AI-2 synthesis protein) |
| [B] Lactobacillus delbrueckii subsp. bulgaricus (strain ATCC BAA-365) | LACDB00076 | LUXS1_LACDB | Autoinducer AI2 synthesis LuxS-like protein |
| [B] Lactobacillus fermentum (strain IFO 3956 / LMG 18251) | LACF301577 | LUXS_LACF3 | Autoinducer-2 production protein |
| [B] Lactobacillus plantarum | LACPL00661 | LUXS_LACPL | S-ribosylhomocysteine lyase |
| [B] Lactobacillus plantarum (strain JDM1) | LACPJ00639 | C6VM79 | S-ribosylhomocysteinase |
| [B] Lactobacillus reuteri (strain DSM 20016) | LACRD01515 | LUXS_LACRD | S-ribosylhomocysteine lyase |
| [B] Lactobacillus reuteri (strain JCM 1112) | LACRJ01458 | LUXS_LACRJ | autoinducer-2 production protein LuxS |
| [B] Desulfotalea psychrophila | DESPS00529 | LUXS_DESPS | S-ribosylhomocysteine lyase |
| [B] Borrelia afzelii (strain PKo) | BORAP00377 | LUXS_BORAP | Hypothetical protein |
| [B] Borrelia burgdorferi | BORBU00376 | LUXS_BORBU | S-ribosylhomocysteine lyase |
| [B] Borrelia burgdorferi (strain ZS7) | BORBZ00360 | LUXS_BORBZ | S-ribosylhomocysteine lyase |
| [B] Borrelia duttonii (strain Ly) | BORDL00364 | B5RLT8 | Autoinducer-2 production protein |
| [B] Borrelia garinii | BORGA00370 | LUXS_BORGA | S-ribosylhomocysteine lyase |
| [B] Borrelia hermsii (strain DAH) | BORHD00361 | B2S081 | Autoinducer-2 production protein LuxS |
| [B] Borrelia recurrentis (strain A1) | BORRA00354 | B5RRI6 | Autoinducer-2 production protein |
| [B] Borrelia turicatae (strain 91E135) | BORT900363 | A1QZG6 | Autoinducer-2 production protein LuxS |