BIOL 112 Lecture 3: Proteins

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Frieder Schoeck

Document Summary

Dna replication, protein synthesis, making of starch: hydrolysis: breaking of covalent bonds with help of water to transform a polymer into its constituent monomers (water in, monomer out, e. g. Function: build structures like hair, replicate dna, catalyze metabolic reactions, transport material inside cells and across the membrane, properties, proteins range in size from a few amino acids to thousands of them. E. g. titin = 33000 amino acids: proteins are polymers of amino acids, folding is crucial to the function of a protein and is influenced largely by the sequence of amino acids, amino acids (20, structure. Ionized form of amino acid (ionized at neutral ph: side groups, nonpolar side chains (not soluble in water, alkyl group, no charged or electronegative atoms to form hydrogen bonds. Peptide bond formation (a condensation reaction) occurs between the carboxyl group of one amino acid and the amino group of the next amino acid generating a peptide backbone consisting of nccnccnccncc repetitions.