| Strain | alkB Gene | Similarity to alkB Gene [alkB R2 Type] (%)* |
| R. erythropolis NDKK1 | + | 99.6 |
| R. erythropolis NDKK2 | + | 100 |
| R. erythropolis NDKK5 | + | 99.9 |
| R. erythropolis NDKK7 | + | 99.8 |
| R. erythropolis NDKK48 | + | 99.7 |
| R. erythropolis ODNM1C | + | 99.8 |
| R. erythropolis NDKY82A | + | 98.1 |
| R. erythropolis ODMI54 | + | 99.7 |
| R. erythropolis ODNM2B | + | 99.2 |
| R. erythropolis NDMI144 | + | 99.7 |
| R. erythropolis NBRC15567 | + | 95.7 |