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      Question

      Which gene mutation was discovered by Mary Brunkow and

      Fred Ramsdell in 2001 linked to autoimmune diseases?
      A p53 Correct Answer Incorrect Answer
      B Foxp3 Correct Answer Incorrect Answer
      C BRCA1 Correct Answer Incorrect Answer
      D HLA-DQ2 Correct Answer Incorrect Answer
      E CD28 Correct Answer Incorrect Answer

      Solution

      In 2001, Mary Brunkow and Fred Ramsdell discovered that a mutation in the Foxp3 gene caused autoimmune disease in both mice and humans. This finding directly linked genetic mutation to immune regulation failure and contributed to understanding regulatory T cells identified earlier by Sakaguchi.

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