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Selected examples of isobaric RNase T1 fragments whose base composition and methylation status can be uniquely defined at the 5 ppm MMA level
| Composition | Mass | Potential T1 Fragment |
|---|---|---|
| CU2AGp + CH2 | 1623.216 | yes |
| C3G2p | 1623.229 | no |
| C4Ap + 4CH2 | 1623.284 | no |
| U3AGp + CH2 | 1624.200 | yes |
| C2UG2p | 1624.213 | no |
| C3UAp + 4CH2 | 1624.268 | no |
| CU2AGp + 2CH2 | 1637.230 | yes |
| C3G2p + CH2 | 1637.243 | yes |
| U3AGp + 2CH2 | 1638.214 | yes |
| C2UG2p + CH2 | 1638.227 | yes |
