You are purifying a protein for the first me and decide to analyze it on SDS PAGE. You run two lanes on  the gel, one with DTT and one without DTT (DTT is a subs tute for Beta-mercaptoethanol that is less  s nky) The lane with DTT yields 2 bands one at 30kD and one at 20kD while the one without yields a  single band at approximately 50 kD.    A. What does this result suggest about the overall protein structure? B. Sketch what may be occurring in this protein natively.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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You are purifying a protein for the first me and decide to analyze it on SDS PAGE. You run two lanes on 
the gel, one with DTT and one without DTT (DTT is a subs tute for Beta-mercaptoethanol that is less 
s nky) The lane with DTT yields 2 bands one at 30kD and one at 20kD while the one without yields a 
single band at approximately 50 kD.   
A. What does this result suggest about the overall protein structure?
B. Sketch what may be occurring in this protein natively.  

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