R help - Jan 2013 - Best way to plot normalization in R

I have a data that looks like this:

     mRNA     Value
    -----------------------------------------------------------
    mRNA1      30
    mRNA2     199
    ...        ...       ...  ....
    mRNA1000   13
   ----------------------------------------

Then I'll normalize the value based on the sum.
What is the best way to show/plot that my normalization works?


Is there any R package for that?

- G.V.

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