protected override string FindModificationChar(PepXmlModifications ppmods, ModificationAminoacidMass modaa, string pureSeq)
{
if (!ppmods.HasModification(modaa.Mass))
{
var newmod = new PepXmlModificationItem()
{
Mass = modaa.Mass,
IsVariable = true,
};
var aa = pureSeq[modaa.Position - 1];
newmod.Aminoacid = aa.ToString();
newmod.MassDiff = Math.Round(modaa.Mass - new Aminoacids()[aa].MonoMass);
if (modaa.Position == 1)
{
newmod.IsTerminalN = true;
}
ppmods.Add(newmod);
ppmods.AssignModificationChar();
}
return(ppmods.FindModificationChar(modaa.Mass));
}
