Mass spectrometry–based relative quantification of proteins in precatalytic and catalytically active spliceosomes by metabolic labeling (SILAC), chemical labeling (iTRAQ), and label-free spectral count

Relative protein abundances of the B- and C- specific proteins. (A) B:C ratios for B-specific proteins. (B) B:C ratios for C-specific proteins. For several proteins, no values for spectral count were obtained as these proteins had spectra only in the B (hSnu23, UBL5, Npw38, SPF30) or the C (PPIL3b, FRG1, NOSIP, C1orf55, FAM50B, C9orf78, DGCR14, CCDC130, NKAP, ZCCHC10, CDK10, TTC14, DDX34, PRKRIP1) complex. For details, see legend to Figure 3.