BPK 110 Lecture Notes - Lecture 6: Beta Sheet, Essential Amino Acid, High-Protein Diet
7 Apr 2017
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Document Summary
Combo of 20 amino acids make up all proteins in nature. 9 amino acids are essential: complete proteins: have all 9 essential amino acids. Each amino acid contains: amino group, acid group, unique side chain. Diets hi in high red, processed meat hi risk of heart disease. Contains some b vit, iron, zinc, calcium (less available) Diets hi in legumes and seeds lower risk of heart disease. Made of long chains aa folded into specific patterns. Aa linked together by peptide bonds form polypeptides: all proteins polypeptides; not all polypeptides are proteins, to be functional protein, need to fold into specific structure w/ 3 or 4 levels of organization. Secondary structure: hydrogen bonds help form 1) alpha-helices (swirly) and 2) beta pleated sheets. Quaternary structure: binding of 2+ polypeptide chains together. Alte(cid:396)atio(cid:374) of p(cid:396)otei(cid:374)"s 3d st(cid:396)u(cid:272)tu(cid:396)e: heat, acid, agitation (ex. cooking, when 3d structure lost, loses original function.
