pgb_liv\php_ms\Search\Parameters\MascotSearchParameters::setPrecursor

Certain data file formats, SCIEX API III, PerSeptive (.PKS), and Bruker (.XML), do not include m/z information for the precursor peptide.

For these formats only, the Precursor field is used to specify the m/z value of the parent peptide. The charge state is defined by the setting of the Peptide Charge field.