ANFS102 Lecture Notes - Lecture 12: Coiled Coil, Carboxylic Acid, Valine
11 Apr 2017
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Document Summary
More than 50% dry weight: enzymes are proteins. Catalysts for reactions in goods: important nutritionally and functionally. Evolving proteins types: plant-based protein, non-dairy milks. Moving away from just soy: soy patties and veggie burgers. 20 amino acids: different properties depending on structure and composition. Side chain: central c atom attached to carboxyl group, amino group, h atom, and another specific side chain. Charge properties: at ph 7, zwitterions: amino group and carboxyl groups are both ionized (nh3+ and coo-, amphoteric in that aa can behave as an acid or a base depending on the ph of the environment. Acid or proton donor, positively charged amino group donates a h+ ion. Base negatively charged carboxyl gains a h+ ion. Based on their side chains, amino acids have different properties. Categories: nonpolar uncharged side chains are hydrophobic. Alanine, valine, leucine, proline, methionine: polar uncharged side chains are hydrophilic.
