Mass spectrometry analysis of protein interacting with G-CRE affinity column from untreated K562 cells.

Functional biological categories of the GCRE protein complex identified by MS/MS analysis. Classifications were made according to the information available in the literature describing the role of these proteins with various DNA/RNA associated functions. The purification procedure is described in Materials and Methods. Numbers in parenthesis indicate the number of peptides detected by MS/MS. Proteins with less than 10 peptide matches were attributed to background contamination and were excluded.