Proteins are found in all cells of the body. Structure and Properties of Proteins Consist of chains of a-amino acids linked by peptide bonds. Many more forms of amino acids are found in proteins.
Proteins use only one type of bond.
No branching of protein chains. Cannot pass across membranes. All subject to denaturation that can change protein structure. Proteins resulting from changing Simple or Conjugated proteins. Amino Acids Amino acids are made usually from carbon, oxygen, hydrogen, nitrogen, and sulfur.