The objective of this study was to evaluate the effects of charge-carrying amino acids (lysine (Lys),
arginine (Arg), aspartic acid (Asp) and glutamic acid (Glu)) on the gelatinization and retrogradation
properties of potato starch. Acidic amino acids (Asp and Glu) showed a decreasing trend in swelling
power and granule size of potato starch, but increased amylose leaching and gelatinization temperature.
Alkaline amino acid (Arg) showed an increasing trend in swelling power and granule size of potato starch,
but decreasing amylose leaching and gelatinization temperature. Lys had no effect on the swelling power
of potato starch, except at a high content (0.2 mol/kg). Like other two acidic amino acids, Lys also
increased gelatinization temperature. Moreover, the addition of alkaline amino acids (Arg) decreased
syneresis value of potato starch but acidic amino acids (Asp and Glu) increased it. Compared to Arg,
the syneresis of potato starch with Lys was similar to that of its native starch.