The temporal profiles of pentosone and 3-DP (Fig. 6A and B) were similar in the Rib-Gly and Rib-Lys models. Both of them increased within 5 min of heating with maximum concentrations of pentosone reaching 3266.7 μg/g d.m. and 2114.4 μg/g d.m. in Rib-Gly and Rib-Lys, respectively. A similar temporal pattern, however at lesser concentrations was obtained for 3-DP in both the Rib-Lys (2087.7 μg/g d.m.) and Rib-Gly (796.7 μg/g d.m.) mixtures, respectively. Glycine significantly (P < 0.05) increased the pentosone and 3-DP concentrations compared to that with lysine when heated for the same duration of time. This was attributed to the rapid elimination of both pentosone and 3-DP following generation in lysine than in glycine MR mixtures.