The Drosophila fl(2)d gene, required for female-specific splicing of Sxl and tra pre-mRNAs, encodes a novel nuclear protein with a HQ-rich domain.
Penalva LO, Ruiz MF, Ortega A, Granadino B, Vicente L, Segarra C, Valcárcel J, Sánchez L. Genetics. 2000 May; 155(1):129-39.