Biochemistry 2280A Lecture Notes - Lecture 3: Covalent Bond, Peptide, Enzyme

• School: Western University
• Department: Biochemistry
• Course: Biochemistry 2280A
• Professor: Christopher John Brandl

Document Summary

Questions: 2-18, 2-19, 4-1, 4-2, 4-4, 4-9, 4-11, 4-12, 4-13, 4-15, 4-16, 4-22. Enzymes- catalyze covalent bond breakage or formation. Structural proteins- provide mechanical support to cells and tissues. Transport proteins- carry small molecules or ions. Motor proteins- generate movement in cells and tissues. Storage proteins- store amino acids or ions. Signal proteins- carry extracellular signals cell to cell. Receptor proteins- detect signals and transmit them to the cell"s response machinery. Gene regulatory proteins- bind to dna to switch genes on or off. Special purpose proteins- highly variable (specialized properties, suck as antifreeze, N-c-c-) sound in every amino acid, thus every polypeptide. Saturday, may 21, 2016: each polypeptide has directionality. Protein folding: electrostatic attractions between two partially charged atoms, h-bonds between h and a partially charged atoms (f, o, Broin, major constituent of silk, because gives them tensile strength: formed when h-bond btwn segments of polypeptide that lie side by side.