For a very long time I have been using Diabetes as an example of a disorder that is caused by a mutation in the insulin gene.  This mutation would stop the cells from making insulin, and a diabetic might need daily insulin injections to regulate their sugar levels properly.  I don’t know what took me so long to realize that this was completely wrong.  That while some diabetics are insulin dependent, it is because their insulin-producing cells of the pancreas are being completely destroyed by the immune system.  And while they still aren’t sure about why these cells are being More >