TABLE 2.
Sequence heterogeneity of the 9-bp SSTR does not alter the encoded amino acidsa
| Variants of 9-bp tandem repeats encoding amino acids Asn-Lys-Asp | Designationb | No. of tandem repeats found in the 9-bp locus | Presence in all strains of subspecies: |
|---|---|---|---|
| AACAAAGAC | SSTR9A | 1–6 | tularensis, holarctica, and novicida |
| AATAAAGAC | SSTR9B | 1–3 | tularensis and novicida |
| AACAAAGAT | SSTR9C | 1 | mediaasiatica |
| AATAAAGAT | SSTR9D | 1–24 | mediaasiatica and novicida |
| AATAAGGAT | SSTR9E | 2–26 | All |
a
The alleles were sequenced in strains belonging to subspecies tularensis (n = 6), holarctica (n = 19), mediaasiatica (n = 2), and novicida (n = 2).
b
Designations SSTR9A to SSTR9E refer to the sequence variants of the 9-bp repeat. The variants were each arranged in tandem, and these tandem regions always appeared in the order A, B, C, D, and E.