Cells: wild-type yeast BY4742 Experiment: - grown in YPD to log-phase - cytosolic fraction separated on sucrose gradient For the fractionation data, cellular lysate was separated in a 7 to 47% sucrose gradient and fractions monitored by UV for RNA content. We chose the fraction containing 80S ribosomes for further analysis. CYS modification: NO Mass spectrometry: LC/LC-MS/MS LCQ Analysis: SEQUEST (Bioworks) Peptide/ProteinProphet