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Polymorphism in polycytidine tract of mga and Mga length of M14 and M23 GAS.
| Strain | M type | Polycytidine tract | AA No. of Mga |
|---|---|---|---|
| NS501 | M14 | c.1574C[8] | 530 |
| NS506 | M14 | c.1574C[8] | 530 |
| 33042V1T1 | M14 | c.1574C[8] | 530 |
| NS4985 | M14 | c.1574C[8] | 530 |
| NCTC8199 | M14 | c.1574C[6] | 543 |
| HSC5 | M14 | c.1574C[6] | 543 |
| N23ND | M23 | c.1555C[5]/c.1573[9] | 530 |
| NCTC4001 | M23 | c.1555C[6]/c.1574C[6] | 543 |
