HNSC 1200 Lecture Notes - Lecture 27: Beta Sheet, Peptide, Protein Structure
7 May 2017
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Document Summary
Identify food sources of protein and discuss the role of protein in those foods . Describe protein quality factors and discuses the strategy of protein complementation . Proteins are compounds made up of carbon, hydrogen, oxygen and nitrogen. Proteins re arranged in strands of amino acids. Amino acids are the building blocks of proteins. The amino acids in a strand differ from one another a protein strand could have. All amino acids have the same chemical backbone: a single carbon atom, with an twenty different amino acids! amine group and an acid group attached. Each amino acid has a distinctive side chain which gives it its identity and chemical nature. The side chains make the amino acids differ in size, shape and electrical charge (positive, negative or neutral) Amino acids are joined together by peptide bonds to form proteins: 2 amino acids = dipeptide. Several dozen to 300 amino acids join to form a protein.
