It is generally stabilized by outside polar hydrophilic hydrogen and. Protein structure is defined as a polymer of amino acids joined by peptide bonds. 59 Protein Structure Primary Secondary Tertiary Quatrenary Article Khan Academy Biologia Bioquimica Ensenanza Biologia Generally the information for protein structure is contained within the amino acid. . The interactions and bonds of side chains within a particular protein determine its tertiary structure. This is the structure that gives protein the 3-D shape and formation. 23 The tertiary structure of proteins. Proteins can be classified into two types- fibrous and globular. Structural proteins are quite ordered in shape whereas globular proteins. After the amino acids form bonds secondary structure and shapes like helices and sheets the. The secondary structure is. This final shape is determined by a variety of bonding interactions between the side chai...