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Summary of nisin variants reported in the literature.
| Nisin variant | First reported in | Reference |
|---|---|---|
| A | L. lactis subsp. lactis | 1 |
| Z | L. lactis strain NIZO 22186 (dairy product) | 9 |
| Q | L. lactis 61–14 (Japanese river water) | 12 |
| F | L. lactis F10 (freshwater catfish) | 11 |
| U and U2 | S. uberis strain 42 (bovine mammary secretions) | 13 |
| P | Streptococcus gallolyticus subsp. pasteurianus | 17 |
| H | S. hyointestinalis DPC 6484 (porcine intestine) | 15 |
| O | Blautia obeum A2–162 (human GI tract) | 16 |
