FMR1 and fragile X syndrome: These FMR1-derived lncRNAs are primate-specific, and animal models have not addressed their potential influence on the FXS phenotype (The Dutch-Belgian Fragile X Consortium 1994; Chen and Toth 2001; Fisch et al. 1999; Godfraind et al. 1996; Miller et al. 1999; Stafstrom et al. 2012).