public void ClearNTerminusMod()
{
ChemicalFormula formula = new ChemicalFormula("Fe");
_mockPeptideEveryAminoAcid.SetModification(formula, Terminus.N);
_mockPeptideEveryAminoAcid.ClearModifications(Terminus.N);
Assert.IsNull(_mockPeptideEveryAminoAcid.NTerminusModification);
}