Identification of the blue pigment formed in a D-glucose-glycine reaction system.

D-Glucose (0.7 M), glycine (0.3 M), and sodium hydrogencarbonate (0.

Formation mechanisms of melanoidins and fluorescent pyridinium compounds as advanced glycation end products.

The formation mechanisms of melanoidins as advanced glycation end products (AGEs) have not been resolved. Blue and red pigments generated in the D-xylose-glycine reaction system are postulated to be intermediate oligomers in the generation of melanoidins. A novel blue pigment, designated blue-M5, was identified as a similar structure to blue-M1 except for the side chain of two dihydroxypropyl groups.