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What happens to water molecules when peptide bonds form?
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Protein
The molecular structure of a peptide (a small protein) consists of a sequence of amino acids.
When peptide bonds form between amino acids, a condensation reaction occurs. During this process, an –OH group is lost from the carboxyl group of one amino acid, and a hydrogen atom is lost from the amino group of a second amino acid. These components combine to form a molecule of water as a byproduct of the linkage.1