BIO 152 Lecture Notes - Lecture 2: Negative Feedback, Enzyme, Activation Energy
12 Apr 2017
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Bio 152 lecture 2 proteins and enzymes. Chains of amino acids: linked by peptide bond, 20+ different side chains on amino acids, chain can be hundreds of amino acids long. Order of amino acids (primary structure) is important: creates the folded 3 dimensional structure of protein. How are amino acids put together: condensation reaction. Proteins three dimensional shape allow it to perform roles: tertiary structure allows proteins to bind to things, many roles. Proteins are strings of amino acids: some amino acids side chains are polar; some amino acids are nonpolar. Proteins and other macromolecules will fold or arrange themselves so that the polar regions are facing water and the nonpolar regions are facing other nonpolar regions. Proteins that are embedded in nonpolar membranes will have polar sections and non- polar sections inside the membrane. Most enzymes are proteins: exception: ribosome and similar rna based enzymes. Inhibitors competitive and noncompetitive: metabolic pathways. Acetylcholine substrate: the molecule the enzyme acts upon.
