Interestingly, the level of expression of UBE2C [8], EBF3, GAP43, and PDC [11] was reminiscent of a profile of non-proliferative subtype 1 retinoblastoma (cluster 1 population [11]), also cited in previous studies as cone precursors [8] and cone precursor-like [9]. This evidence concerns the gene UBE2C and retinoblastoma.