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Kaplan Qbank USMLE



Author5 Posts
  #1

Cloning of a new eukaryotic gene was followed by insertion and
ligation of the gene in an expression vector. The protein
translated from this gene was then studied on a western blot,
and probed with 32P-DNA, yielding a positive result. These
findings eliminate which of the following substances as a
candidate for the likely gene product?
A. CREB
B. Protein kinase A
C. RNA polymerase
D. SP-1
E. Steroid receptor

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megha

  #2

My guess steroid receptor

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  #3

My choice is Protein Kianse A
If you are probing for a protein using a DNA probe, then the protein should be a DNA binding protein. Protein Kinase A is the only one that doesen't bind to DNA.

  #4

u r right vrach

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megha

  #5

if the probe yields a +ve result, ,that means that the protein is a DNA binding protein. rite
but in the question the given protein gave +ve result with DNA so it should be a DNA binding prot. isnt it?

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