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I believe there is a mistake in the legend of the C fragment picture. The C fragment is part of the heavy chain, not the light one. It is important as it is the heavy chain that is responsible for binding and retrograde transport of the protein, the light chain has a proteolytic role. First time I edit something so I'm sorry if I am writing this comment at the wrong place. Good day.
The photo does not seem to describe how this toxin works at all. It only shows some molecule entering an axon then leaving o_O — Preceding unsigned comment added by 184.108.40.206 (talk) 15:15, 24 June 2013 (UTC)