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Seeing as there's no one else who commented on this, I'm assuming I'm wrong about something. On page 12 in the Examkracker's BIO1 manual (topic is Amino Acids and Proteins), there is a statement that "nitrogen is most stable with four bonds". The statement is in reference to the partial double bond character of peptide bonds, due to delocalization of electrons between the nitrogen and carbonyl carbon. However from my knowledge, nitrogen is most stable with three bonds and a lone pair (otherwise it takes on a charge) . My deduction was that the delocalization is occurring because of nitrogen's lone pair. Can anyone explain to me where I'm wrong here?