NUTR 3210 Lecture Notes - Lecture 1: Nitrogen Balance, Trypsin Inhibitor, Nitrogen Cycle
Document Summary
What is a protein: macronutrient, health canada recommends that protein intakes comprises 10-30% of total energy (me, main functions: Energy, me = 4kcal/g: requirements are for amino acids rather than whole proteins, very important: national and international recommendations for protein intake are based on animal sources of protein such as meat, cows milk and eggs. Amino acids connected by peptide bonds: amino acids join through condensation reactions, in which water is lost by a reaction b/w the carboxyl group of one amino acid and the amino group of another amino acid. Proteins can be normal 3d configuration denatured by: When denatured a protein loses its biological activity. Denaturation affect 2, 3 and 4 degree structures, therefore peptide bonds b/w amino acids are intact: result: open up the protein so enzymes can break peptide bonds, egg protein is called albumin. The albumin in its native form is transparent and liquid.
