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What is a tautomeric shift, why do they occur in nitrogenous bases, and why do they cause transition mutations and not transversion mutations? 

          What is a tautomeric shift, why do they occur in nitrogenous
bases, and why do they cause transition mutations and not
transversion mutations?

Added by Troy G.

Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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What is a tautomeric shift, why do they occur in nitrogenous bases, and why do they cause transition mutations and not transversion mutations?
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00:01 Hello everyone in this question we'll be talking about the tautomeric shift and why do they happen in the nitrogenous basis and why do they cause the transition mutation so the answer to this question is the tautomeric shift can be defined as a continuous or transient shift in the position of the hydrogen atom in the nitrogenous base and it can result in an alternative hydrogen bonding form and if this occurs during the time of dna replication then it may result in a mutation so the totomiric shift can only result in the transition mutation where purine is converted to purine or pyridine is converted to pyridine as it does not affect the ring structure but the position of of the hydrogen atoms so it can result in the transition mutation...
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