What type of reaction happens when amino acids combine to form proteins and water is released?

When two amino acids form dipeptide through peptide pond, this type of reaction is called condensation reaction.

The reaction produce two amino acids and a molecular of water.

The resulting amino acids are joined by polypeptide chain.

The amide bond is synthesized when the carboxyl group of one amino acid molecule reacts with the amino group of the other amino acid molecule, causing the release of a molecule of water (H2O), hence the process is a dehydration synthesis reaction.