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RNA spikes: length and base composition
| RNA spike | Length (nt) | Base Compositiona) | |||
| C | U | A | G | ||
| sp 1 | 750 | 23.5% | 26.5% | 21.9% | 28.1% |
| sp 2 | 752 | 29.7% | 23.5% | 20.6% | 26.2% |
| sp 3 | 1000 | 23.2% | 25.9% | 16.6% | 34.3% |
| sp 4 | 1000 | 23.5% | 22.0% | 27.0% | 27.5% |
| sp 5 | 1034 | 27.5% | 22.3% | 22.8% | 26.4% |
| sp 6 | 1250 | 27.7% | 21.8% | 22.3% | 28.2% |
| sp 7 | 1474 | 27.9% | 20.5% | 24.4% | 27.3% |
| sp 8 | 2000 | 27.2% | 21.4% | 23.7% | 27.8% |
a) Expressed as percentage of the base with respect to the total nucleotide content
