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. 2015 Jun 18;5:367–380. doi: 10.1016/j.redox.2015.06.005

Fig. 2.

Fig. 2

Reaction of protein carbonyl group with 2,4-dinitrophenylhydrazine. The nucleophilic addition, also called condensation reaction, resulting in a 2,4-dinitrophenyl hydrazone is shown for an oxidized lysine residue (aminoadipic semialdehyde). Note that the reaction is accompanied by the loss of one molecule of water.