39 RPE-specific genes with high expression levels as determined in our previous study [3].

Column four and five show 33 of the 39 genes (85%) were previously described (RNA or protein level) in individual studies in the literature using several different techniques to have RPE expression. Column six shows that 29 of the 39 genes (74%) were also present in a study by Schulz et al. [4] reporting on 13,037 genes expressed in the retina/RPE (their supplementary table 2) ref: literature reference, FC: fold change, average expression level in RPE compared to choroid and photoreceptors in six arrays, 1 in column six: present.