genomic DNA

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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In a hypothetical scenario, you wake up one morning to your roommate exclaiming about her sudden hair growth. She has been supplementing her diet with a strange new fungus purchased at the local farmer’s market. You take samples of the fungus to your lab and you find that this fungus does indeed make a protein (the harE protein) that stimulates hair growth. You construct a fungal genomic DNA library in E. Coli with the hope of cloning the harE gene. If you succeed you will be a billionaire! You obtain DNA from the fungus, digest it with a restriction enzyme, and clone it into a vector.

b) You clone your digested genomic DNA into this vector. The E. coli (bacteria) cells that you will transform to create your library will have what phenotype prior to transformation?
c) How do you distinguish bacterial cells that carry a vector from those that do not?
d) How do you distinguish bacterial cells that carry a recombinant vector from those that carry the original cloning vector?

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