DNAAF4 and dyslexia: Many genetic studies on dyslexia have identified specific chromosomal loci for different dyslexia related phenotypes which suggest many genes are contributing to the predisposition of dyslexia.[13] One of the possible candidate genes which influence dyslexia is DYX1C1. It consists of 10 exons and codes for 420 amino acid protein which is expressed in brain, lung, kidney, and testis.