private void DisplayPeptide(string sequence)
 {
     try
     {
         Peptide peptide = new Peptide(sequence);
         peptideMassTB.Text = peptide.MonoisotopicMass.ToString();
         peptideMZTB.Text = peptide.ToMz(1).ToString();
     }
     catch (Exception)
     {
         peptideMZTB.Text = peptideMassTB.Text = "Not a valid Sequence";
     }
 }
 private void DisplayPeptide(string sequence)
 {
     try
     {
         Peptide peptide = new Peptide(sequence);
         peptideMassTB.Text = peptide.MonoisotopicMass.ToString();
         peptideMZTB.Text   = peptide.ToMz(1).ToString();
     }
     catch (Exception)
     {
         peptideMZTB.Text = peptideMassTB.Text = "Not a valid Sequence";
     }
 }