Quaternary Structure

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Proteins have a variety of shapes and formations. Proteins can have a quaternary structure; this is the final assembly in which proteins can take. It is when at least 2 or more subunits of polypeptide chains interact with each other by forming a range of bonds such as hydrogen bond, disulphide bridges/bonds and many more. Each polypeptide chain can vary in their genes they were coded from. An example of a quaternary structure protein is haemoglobin[1][2]


  1. Millar, T (2006). Biochemistry explained. New York: Taylor & Francis. 51.
  2. Millar, T (2006). Biochemistry explained. New York: Taylor and Francis. 51.
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