Lysine
degradation was already reduced at pH
8.0, since it did not exceed 22% of the
amino acid after 2 h of boiling, and only
5% after 15 min as compared to higher
pH values (13 to 34% loss after 15 min
of heating at pH 9.0 to 12.0). Moreover,
lysine loss resulted almost completely, if
not exclusively, from Maillard reaction,
as no significant loss was observed
when the amino acid was heated in the
absence of fructose