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Figure 2: Quantitative RT-PCR analysis of amyloid precursor protein (APP) in seminomatous germ cell tumors (SGCTs) and nonseminomatous germ cell tumors (NGCTs). The figures in box and whisker plot show the relative mRNA levels of APP quantified by normalization to GAPDH mRNA levels. Bars, ±SDs. A statistically significant difference in APP expression was observed between SGCTs and NGCTs ( ).