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|−| Quaternary structure is the 4th level of protein structure . Proteins containing more than one polypeptide chain (subunits) form quaternary structure. The simplest form is a dimer, where 2 subunits interact. There are more complicated forms than this though. One of these is Haemoglobin, which carries oxygen in the blood, it has 4 subunits joined together by interactions. Small, reversible changes in the structure allow it to carry oxygen to our organs. |+|
structure is the level of protein structure.
Latest revision as of 16:46, 3 December 2017
A protein structure consisting of several polypeptide chains, it is the highest level of protein structure.