Bio5 LECTURE 6

Bio5 LECTURE 6 - Tertiary structure: formed by interactions...

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DEHYDRATION SYNTHESIS : MONOMERS JOIN BY SPLITTING OUT H 2 O HYDROLYSIS : POLYMER SPLIT BY ADDING H 2 O CARBOHYDRATES : HYDROXYL, CARBONYL GRPS. STORAGE POLYSACCHS STRUCTURAL POLYSACCH : CELLULOSE LIPIDS : METHYL GROUPS DOMINATE 3 CLASSES OF LIPIDS: TRIACYLGLYCEROLS : STORE ENERGY FUNCTION FATS : (ANIMALS) HIGH SAT. FATTY ACIDS, SOLID AT ROOM TEMP, INCREASE ATHEROSCLEROSIS OILS : (PLANTS, FISH) MORE UNSAT. FATTY ACIDS, LIQUID AT ROOM TEMP. PHOSPHOLIPIDS : MEMBRANE ROLE STEROIDS : MEMBRANE, HORMONE ROLES; INCREASES ATHEROSCLEROSIS
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OUTLINE MACROMOLECULES PROTEINS : AMINO ACIDS 3 CLASSES OF AA SIDE GROUPS 4 LEVELS OF PROTEIN STRUCTURE NUCLEIC ACIDS : NUCLEOTIDES
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Primary structure: the amino acid sequence or polypeptide chain
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Secondary structure: formed within the polypeptide chain due to hydrogen bonding
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Unformatted text preview: Tertiary structure: formed by interactions of side chains Quaternary structure: results from interaction of multiple protein units PROTEIN-FOLDING A spontaneous but non-random process An extremely complex process that produces only one correct conformation for each protein PROTEIN-FOLDING Protein folding takes place through several intermediate steps all influenced by pH, temperature, ion composition and concentration PROTEIN-FOLDING Alterations at any level of protein organization can have dramatic effects on protein function the best documented cases concern changes in primary structure ATP IONIZED AS IN BIOLOGICAL RANGE 5<pH<8 SIMILAR TO FIG. 8.8 Dehydration Synthesis of DNA Similar to Figure 16.8...
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Bio5 LECTURE 6 - Tertiary structure: formed by interactions...

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