old_contents: DECOY_PREFIX = 'decoy_'
  
  HEADER_SPECFILE = '#SpecFile'
  HEADER_SCANNR = 'ScanNum'
  HEADER_SPECSCANID = 'SpecID'
  HEADER_CHARGE = 'Charge'
  HEADER_PEPTIDE = 'Peptide'
  HEADER_PROTEIN = 'Protein'
  HEADER_GENE = 'Gene ID'
  HEADER_SYMBOL = 'Gene Name'
  HEADER_DESCRIPTION = 'Description'
  HEADER_PRECURSOR_MZ = 'Precursor'
  HEADER_PRECURSOR_QUANT = 'MS1 area'
  HEADER_PREC_PURITY = 'Precursor ion fraction'
  HEADER_PRECURSOR_FWHM = 'FWHM'
  HEADER_MASTER_PROT = 'Master protein(s)'
  HEADER_PG_CONTENT = 'Protein group(s) content'
  HEADER_PG_AMOUNT_PROTEIN_HITS = 'Amount of matching proteins in group(s)'
  HEADER_PG = [HEADER_MASTER_PROT, HEADER_PG_CONTENT,
               HEADER_PG_AMOUNT_PROTEIN_HITS]
  HEADER_SVMSCORE = 'percolator svm-score'
  HEADER_MISSED_CLEAVAGE = 'missed_cleavage'
  HEADER_PSMQ = 'PSM q-value'
  HEADER_PSM_PEP = 'PSM PEP'
  HEADER_PEPTIDE_Q = 'peptide q-value'
  HEADER_PEPTIDE_PEP = 'peptide PEP'
  HEADER_TARGETDECOY = 'TD'
  HEADER_MSGFSCORE = 'MSGFScore'
  HEADER_EVALUE = 'EValue'
  HEADER_SETNAME = 'Biological set'
  HEADER_RETENTION_TIME = 'Retention time(min)'
  HEADER_INJECTION_TIME = 'Ion injection time(ms)'
  HEADER_ION_MOB = 'Ion mobility(Vs/cm2)'
  MOREDATA_HEADER = [HEADER_RETENTION_TIME, HEADER_INJECTION_TIME, HEADER_ION_MOB]
  PERCO_HEADER = [HEADER_SVMSCORE, HEADER_PSMQ, HEADER_PSM_PEP, HEADER_PEPTIDE_PEP, HEADER_PEPTIDE_Q, HEADER_TARGETDECOY]
  
new_contents: DECOY_PREFIX = 'decoy_'
  
  HEADER_SPECFILE = '#SpecFile'
  HEADER_SCANNR = 'ScanNum'
  HEADER_SPECSCANID = 'SpecID'
  HEADER_CHARGE = 'Charge'
  HEADER_PEPTIDE = 'Peptide'
  HEADER_PROTEIN = 'Protein'
  HEADER_GENE = 'Gene ID'
  HEADER_SYMBOL = 'Gene Name'
  HEADER_DESCRIPTION = 'Description'
  HEADER_PRECURSOR_MZ = 'Precursor'
  HEADER_PRECURSOR_QUANT = 'MS1 area'
  HEADER_PREC_PURITY = 'Precursor ion fraction'
  HEADER_PRECURSOR_FWHM = 'FWHM'
  HEADER_MASTER_PROT = 'Master protein(s)'
  HEADER_PG_CONTENT = 'Protein group(s) content'
  HEADER_PG_AMOUNT_PROTEIN_HITS = 'Amount of matching proteins in group(s)'
  HEADER_PG = [HEADER_MASTER_PROT, HEADER_PG_CONTENT,
               HEADER_PG_AMOUNT_PROTEIN_HITS]
  HEADER_SVMSCORE = 'percolator svm-score'
  HEADER_MISSED_CLEAVAGE = 'missed_cleavage'
  HEADER_PSMQ = 'PSM q-value'
  HEADER_PSM_PEP = 'PSM PEP'
  HEADER_PEPTIDE_Q = 'peptide q-value'
  HEADER_PEPTIDE_PEP = 'peptide PEP'
  HEADER_TARGETDECOY = 'TD'
  HEADER_MSGFSCORE = 'MSGFScore'
  HEADER_EVALUE = 'EValue'
  HEADER_SETNAME = 'Biological set'
  HEADER_RETENTION_TIME = 'Retention time(min)'
  HEADER_INJECTION_TIME = 'Ion injection time(ms)'
  HEADER_ION_MOB = 'Ion mobility(Vs/cm2)'
  MOREDATA_HEADER = [HEADER_RETENTION_TIME, HEADER_INJECTION_TIME, HEADER_ION_MOB]
  PERCO_HEADER = [HEADER_SVMSCORE, HEADER_PSMQ, HEADER_PSM_PEP, HEADER_PEPTIDE_Q, HEADER_PEPTIDE_PEP, HEADER_TARGETDECOY]
  
subject: Switch position peptide PEP and peptide q-value in PSM table