UV light and Oral Bacteria

Karl Roberts kr1 at PGSTUMAIL.PG.CC.MD.US
Tue Feb 18 13:22:16 EST 1997


You might be dealing with light repair of DNA. Certain 
wavelengths of ultraviolet light (~260-280 nm) can trigger thymine 
(pyrimidine) dimers (bonds between adjacent thymine molecules) which 
trigger mutation and death in many cells. Some, however, use 
endonucleases to remove the mutated portion, then repair the segment with 
DNA polymerase.
Joe

On Mon, 17 Feb 1997 RGuar1215 at aol.com wrote:

> I am working on a science fair project this year and would like some
>  additional information for my project. My problem is: How does
>  ultraviolet light affect the growth of super oral bacteria? When
>  ultraviolet light is applied to oral bacteria, it kills most of them.
>  However, a small percentage will still be alive. This is super oral
>  bacteria. That is the basis of the experiment, and I will be very
>  appreciative to anyone who would offer information on ultraviolet light,
>  transferring bacteria from agar plates, oral bacteria, or most
>  importantly super bacteria in general.
> 
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