1. Doesn't non-fat milk protein contain casein which interacts with the Bradford reagent. why would this react with the Bradford or Bruiet reagent? 2. Tryptophan is an amino acid and there should not be a reaction with the reagent. Why would there be a reaction with the Bradford or Biuret reagent?

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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1. Doesn't non-fat milk protein contain casein which interacts with the Bradford reagent. why would this react with the Bradford or Bruiet reagent?

2. Tryptophan is an amino acid and there should not be a reaction with the reagent. Why would there be a reaction with the Bradford or Biuret reagent?

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Bradford and biuret reagent reacts with protein andg ives a visible colour.

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