There are many kinds of proteins Hemoglobin, a transport protein Structural proteins are found is the component of blood that in skin hair, and bones takes the oxygen we breathe to ur cells Contractile proteins in muscles allow us to move Some proteins are hormones that regulate body metabolism and growth White blood cells produce antibodies nrymes are proteins that Storage proteins serve as a which are proteins that fight infections. act as catalysts for reactions source of amino acids in milk in the body, including the digestion of food Figure 13.18 The variety of proteins in the human body
There are many kinds of proteins
The Four Levels of protein Structure Protein structure The amino o represents the side chain of the acid monomer amino acid and is different on each is determined by of the 20 amino acids Polypeptide attractions strand Primary between structure neighboring a Helix B-Pleated sheet amino acids 角 Secondary structure Hydrogen bond Tertiary Disulfide bond structure Quaternary structure
Protein structure is determined by attractions between neighboring amino acids