Use of the data set to detect novel activation increases was demonstrated by expression analysis for several genes that have human homologs located within unidentified retinal disease regions: Slc25a33, Lpcat1, Ccdc126, and Arl4d. Analysis of photoreceptor-deficient retinas indicated that all four genes are expressed in photoreceptors. Here, ARL4D is linked to Abnormal retinal morphology.