THOC3 is part of the TREX (transcription/export) complex, which includes THO2, HPR1, ALY, and UAP56.TEX1 is part of the TREX (transcription/export) complex, which includes THO2 (MIM 300395), HPR1 (MIM 606930), ALY (MIM 604171), and UAP56 (MIM 606390).[supplied by OMIM].