"ValueError: min() arg is an empty sequence" in validation of deamidated identifications

[DongElkan]

Raise ValueError: min() arg is an empty sequence in validation of deamidated identifications. This exception happens because in _apply_deamidation_correction method, the deamidated peptides are compared to non-deamidated analogues. The latter can't generate features for modified fragments if the target_mod is deamidation since this modification is removed, raising the exception. Thus rPTMDetermine can't validated deamidated peptide identifications. Alternative option is to set correct_deamidation=False to skip deamidation correction, though the results will be biased.