Characterization of Human Skeletal Muscle Biopsy Samples Using Shotgun Proteomics

We characterized the human muscle proteome by studying muscle biopsy specimens through four different workflows, using 1 or 2D peptide separation, SDS gels, or differential solubilization. By performing MS/MS analyses of 178 4-h LC separations derived from 31 patients, we identified more than 2000 proteins, and determined how 370 very abundant proteins behave upon differential solubilization. The resulting semiquantitative database should serve as a resource for muscle biochemistry.