FMR1 Gene Expression
The FMR1 gene is located on the X chromosome and contains a DNA segment called CGG trinucleotide. In most people, the CGG segment is repeated in the gene approximately 5-44 times. Increased expression of the CGG segment on the FMR1 gene is associated with impaired cognitive and reproductive function. If a person has 45-54 repeats this is considered the “gray zone” or borderline risk, 55-200 repeats is called premutation and more than 200 repeats is considered a full mutation of the FMR1 gene according to the American College of Medical Genetics.
The FMR1 gene can be found on the long (q) arm of the X chromosome at position 27.3, from base pair 146,699,054 to base pair 146,738,156.
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