BIO206H5 Lecture 4: BIO206_Lec4_Sept17
Document Summary
What are proteins and what do they do? evolved in intracellular communication act as receptors signalling enzymes. Motor protein transport gene regulation immune system antibodies: protects us from the surroundings storage, store nitrogen, carbon, components for long term survival of cells. Functions of protein are related to their unique structure and composition hundred of billions of different type of proteins are possible. 3d structure and chemical reactivity contribute to defining protein functionality. Most complex macromolecule in living organisms proteins are linear, unbranched polymers of amino acids. 20 (21) differnet amino acids that make up all proteins. Central carbon (a carbon: amino group, carboxyl group, hydrogen, side chain (r group) Determines what protein it will be: 4 different groups bonded to the tetrahedral ca all amino acids are stereo specific (meaning can have both right and left hand forms) R groups determines amino acids uses peptide bonds. Determine the nature of an amino acids; reactivity and solubility.
