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    • About Fragile X Syndrome

      Centers for Disease Control and Prevention· 6 days ago

      What is fragile X syndrome (FXS)? Fragile X syndrome (FXS) is a genetic disorder caused by changes in a gene called fragile X messenger ribonucleoprotein 1 (FMR1). FMR1 usually makes a protein called FMRP that is needed for brain development.