Plemental Table S2), MS/MS spectra were queried for peptide sequence information using SEQUEST v.27 (revision 9) (31) against 30,552 human proteins (non-redundant NCBI sequences on March 4, 2008) plus 162 sequences from usual contaminants (e.g. human keratins etc.) and 313 previously identified NETs (21). To estimate false discovery rates, each non-redundant protein entry was randomized and added