Table I

High confidence proteins identified by mass spectrometry

Listed are the total number of proteins with a confidence level higher than 95% and the corresponding spectral counts identified in each cell fraction. MB, myoblasts; rm, reverse match as a measure of false positives (% total).

ProteinsTotal spectral count
2 days1,1289,856
4 days7494,723
6 days7354,194
10 days7093,165
rm (%)47 (2.5%)100 (0.35%)