Table 1. Summary of Molecular Genetic Testing Used in SCA1
Gene |
Test Method |
Mutation Detected |
Mutation Detection Frequency by Test Method 1 |
ATXN1 |
≤ ~100 CAG repeats |
>99% |
|
Targeted mutation analysis (Southern blot, long-range PCR, CAG-primed PCR) |
> ~100 CAG repeats |
<1% 2 |
1. The ability of the test method used to detect a mutation that is present in the indicated gene
2. Typically observed in individuals with infantile or childhood onset in families with SCA1
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