| Intron-containing genes | Intronless genes | P(Mann-Whitney U test) |
---|---|---|---|
mRNA abundance (molecules/cell) | 4.9 | 1.3 | 10-33 |
 | 23 ± 38 | 4.2 ± 18 |  |
Nascent transcription rate (molecules/min) | 0.27 | 0.12 | 7 × 10-28 |
 | 0.37 ± 0.33 | 0.16 ± 0.20 |  |
RNA polymerase II density (molecules/kb) | 0.18 | 0.077 | 7 × 10-28 |
 | 0.25 ± 0.22 | 0.11 ± 0.13 |  |