“…Amadori adducts). Several methods are available for the chemical estimation of reactive E-NH2 groups in proteins, including reaction with trinitrobenzene sulphonic acid (TNBS; Kakade and Liener, 1969), o-methylisourea (Mauron and Bujard, 1964), borohydride (Hurrell and Carpenter, 1974), [ 14 C]succinic anhydride (Anderson and Quicke, 1984) and fluorodinitrobenzene (FDNB;Carpenter, 1960;Mottu and Mauron, 1967). Although still used occasionally to measure the destruction of lysine in food systems, the TNBS method is very unsatisfactory for this purpose due to reaction of the reagent with the Amadori adduct (Hurrell and Carpenter, 1974).…”