CSMSL.Proteomics.AminoAcid.ToHeavyModification C# (CSharp) Method

        public ChemicalFormulaModification ToHeavyModification(bool c, bool n)
        {
            var formula = new ChemicalFormula();
            if (c)
            {
                Element carbon = PeriodicTable.GetElement("C");
                int carbon12 = ChemicalFormula.Count(carbon[12]);
                formula.Add(carbon[12], -carbon12);
                formula.Add(carbon[13], carbon12);
            }

            if (n)
            {
                Element nitrogen = PeriodicTable.GetElement("N");
                int nitrogen14 = ChemicalFormula.Count(nitrogen[14]);
                formula.Add(nitrogen[14], -nitrogen14);
                formula.Add(nitrogen[15], nitrogen14);
            }

            return new ChemicalFormulaModification(formula, "#", Site);
        }