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Select the chemical consequences that could contribute to DNA instability at AP sites. fewer hydrogen bonds between the unpaired pyrimidine base and water disruption of the base-stacking interactions decreased interaction between the mutated DNA strand and histones increased ability of the deoxyribose ring to open without the attachment of the purine base

Select the chemical consequences that could contribute to DNA instability at AP sites. fewer hydrogen bonds between the unpaired pyrimidine base and water disruption of the base-stacking interactions decreased interaction between the mutated DNA strand and histones increased ability of the deoxyribose ring to open without the attachment of the purine base

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Hydrolysis of the N-glycosyl bond between deoxyribose and a purine base in DNA creates an apurinic (AP) site. An AP site is more thermodynamically destabilizing to a DNA molecule than is a mismatched base pair. Examine the structure of an AP site. H₂N HN N O™ -O-P-O-CH₂ Guanine H₂N N HN Select the chemical consequences that could contribute to DNA instability at AP sites. H H 1₂0/ H fewer hydrogen bonds between the unpaired pyrimidine base and water disruption of the base-stacking interactions decreased interaction between the mutated DNA strand and histones increased ability of the deoxyribose ring to open without the attachment of the purine base H H Guanosine residue (in DNA) O™ -O-P-O-CH₂ O H H H O Apurinic residue H OH H
Transcribed Image Text:Hydrolysis of the N-glycosyl bond between deoxyribose and a purine base in DNA creates an apurinic (AP) site. An AP site is more thermodynamically destabilizing to a DNA molecule than is a mismatched base pair. Examine the structure of an AP site. H₂N HN N O™ -O-P-O-CH₂ Guanine H₂N N HN Select the chemical consequences that could contribute to DNA instability at AP sites. H H 1₂0/ H fewer hydrogen bonds between the unpaired pyrimidine base and water disruption of the base-stacking interactions decreased interaction between the mutated DNA strand and histones increased ability of the deoxyribose ring to open without the attachment of the purine base H H Guanosine residue (in DNA) O™ -O-P-O-CH₂ O H H H O Apurinic residue H OH H
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