Glu -> Fru Fru -> Glu Glu -> C5 + Formic_acid Fru -> C5 + Formic_acid Fru -> 2*Triose Triose -> Acetic_acid + Cn Glu + lys_R -> Amadori Amadori -> Acetic_acid + lys_R Amadori -> AMP Fru + lys_R -> AMP AMP -> Melanoidin