Table 1.
Myosin heavy chain isoform abundance in rat slow-twitch soleus and fast-twitch extensor digitorum longus skeletal muscles determined by mass spectrometry
| Gene | Fiber type | SOL | EDL | ||
| Abundance, % | SD | Abundance, % | SD | ||
| MYH7 | I | 87.6 | 2.3 | 0.8 | 0.1 |
| MYH2 | IIA | 11.8 | 2.2 | 5.1 | 0.5 |
| MYH4 | IIB | 0.0 | 0.0 | 70.4 | 0.7 |
| MYH1 | IID/X | 0.2 | 0.1 | 23.7 | 0.5 |
| MYH3 | 0.5 | 0.8 | 0.2 | 0.3 | |
Abundance percentage determined as described in SI Appendix, Materials and Methods. SD determined from multiple muscle samples (SOL, n = 7; EDL, n = 7). MYH3 is an embryonic isoform, and not associated with any specific muscle fiber type.