## Comet parameter: decoy_prefix

- This parameter specifies the prefix string that is pre-pended to the protein identifier and reported for decoy hits.
- This parameter is only valid when a decoy_search is performed.
- For example, if the prefix parameter is set to "decoy_prefix = reverse_", a match to a decoy peptide from protein "ALBU_HUMAN" would return "reverse_ALBU_HUMAN" as the protein identifier.
- The default value is "DECOY_" if this parameter is missing.

Example:
`decoy_prefix = DECOY_`
`decoy_prefix = rev_`
`decoy_prefix = --any_string_you_want_without_spaces--`