26 part 1 - CHAPTER 26 CHAPTER 26 Nucleic Acids...

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Unformatted text preview: CHAPTER 26 CHAPTER 26 Nucleic Acids deoxyribonucleic acid (messenger) ribonucleic acid transfer RNA, ribosomal RNA DNA-dependent DNA polymerase DNA-dependent RNA polymerase ribosome DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are polymers of phosphoric acid, a sugar (ribose in RNA and deoxyribose in DNA), and four nitrogen bases (ACTG in DNA and ACUG in RNA). Bases can be in syn- or anti-conformation: Nucleoside = Sugar + Base Nucleotide = Nucleoside + Phosphate Nucleic acid strands can interact by base-pairing. Nucleic acids can form a double helix. Nucleic acids can form a double helix. DNA is a double helix consisting of two polynucleotide strands hydrogen-bonded to each other through their bases and running in opposite directions. The individual base pairing energies are: G C: 27 7 kcal mo-1 G-C: 27.7 kcal mol 1 A-T: 15.1 kcal mol-1 . Nucleic acids can form a double helix....
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This note was uploaded on 12/26/2008 for the course CHEM CHEM 140C taught by Professor Finn during the Spring '08 term at UCSD.

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26 part 1 - CHAPTER 26 CHAPTER 26 Nucleic Acids...

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