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Nucleotide modifications used in the synthesis of modified RNA.
| Modification | M0 | M1 | M2 | M3 |
| Base composition | A, G(+ARCA), C, U | A, G, C, Ψ 100% | A, G(+ARCA), C, Ψ 100% | A, G(+ARCA), C, Ψ 50% |
| Modification | M4 | M5 | M6 | M7 |
| Base composition | A, G(+ARCA), C, Ψ 50%, m5C 50% | A, G(+ARCA), C, Ψ 50%, m5C 50%, m6A 20% | A, G (+ARCA), C, Ψ 100%, m6A 20% | A, G, C, Ψ 100% + cap(1) |
