3.1.2 Physicochemistry Analysis
The total carbohydrate and uronic acid contents of GP were 82.3% and 10.2%, respectively. After Sevage reagent treatment, the protein content of GP decreased from 23.1 to 7.1%. The sugar components were analyzed by converting the sugars into PMP derivatives. HPLC results showed that GP was composed of galacturonic acid (GalA), glucose (Glc), galactose (Gal), and arabinose (Ara) in a molar ratio of 1.6 to 5.1 to 1.0 to 1.6, respectively (Fig. 1B).