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As the pH increases, the amino group looses a proton. Proteins are formed by a condensation reaction that joins the amino group of one amino acid with the carboxyl group of another. The resulting bond is a type of covalent bond called a peptide bond.Thus, proteins are also called polypeptides-because they contain oodles of peptide bonds.rimary structure-Refers to the sequence of amino acids in the protein. Once formed, the protein immediately folds and takes on a particular 3D configuration (see below). The shape of the protein is determined by the sequence of amino acids (the primary structure). Let s use pop beads to model a protein.
Exactly. Amino acids can join together in a condensation reaction, when the amine group of one molecule reacts with the carboxylic acid group of a second molecule, eliminating a molecule of water. They form a peptide link (-CO-NH-). Two amino acids form a dipeptide; three form a tripeptide and so on.hen glycine joins to a different amino acid (R does not equal H), then there are two possible dipeptides. As there are 22 different natural amino acids (20 being common amino acids), there are huge numbers of different products possible when amino acids join together.