TABLE 1

Comparison of measured relative abundance of molecular anion isotope peaks with calculated values for theoretical phosphorylated and sulfated forms

m/z Calculated Abundance: Sulfate Form Calculated Abundance: Phosphate Form Measured Abundance
% %
485.1 100.0 100.0 100.0
486.1 25.0 24.2 26.8
487.1 9.6 5.0 11.0
488.1 1.9 0.0 2.3