private void rbMeanValue_CheckedChanged(object sender, EventArgs e)
 {
     if (!rbMeanValue.Focused && !rbPerRowColumn.Focused)
     {
         return;
     }
     if (rbMeanValue.Checked && PA != null)
     {
         PA.NormMode = NormalizationMode.Mean;
         PA.Renormalize();
         LoadNormalizedMatrixFromPeptideArrayToGrid();
         ColorGrids();
         DrawColorMatrix();
     }
 }