notes 1-26 - T he Structu re of P roteins Primary Structure...

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The Structure of Proteins Primary Structure: consists of the specific amino acids in a polypeptide chain Secondary Structure: consists of the folding or coiling or amino acids chains into a particular pattern (H+ bond) Tertiary Structure: folding of the protein into globular shapes or fibrous thread like strands (everything in secondary +) Quaternary Structure: the association of several tertiary-structured polypeptide chains Fig 2.18 Nucleotides and Nucleic Acids *nucleotides join to form nucleic acids *nucleotide= nitrogen base + sugar + phosphate Functions: 1. Storage of energy in high-energy bonds 2. Store information that directs protein synthesis 3. Information can be transferred from parent to progeny (they make up the genes) Fig 2.20b *DNA and RNA contain nucleotides *fig 2.21 Deoxyribose (thymine) -5 __ sugars Ribose (uracil) -different nitrogenous base Differences in DNA & RNA 1. Single vs double helix 2. Nitrogenous base 3. Uracil vs thymine -part B -A & T = 2 bonds -G & C = 3 bonds (hydrogen) Table 2.5 END CHAPTER 2
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CHAPTER 4
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