However, the percentage of phospho-S6 positive cells in Tg(flk1:RFP)is18/+ tumor tissue was not significantly different than in wild-type retina (Fig. 7h, 11.4% ± 0.9 vs. 13.9% ± 1.7, p = 0.2291, n = 9 sections, three sections each from three individuals of each genotype). This evidence concerns the gene KDR and neoplasm.