Gene Expression of NNMT and PRKAB1 Biomarkers across Multiple Tissues and Platforms. The differences in gene expression among three common subtypes of renal cell carcinoma are shown. In all panels, blue Xs and "CC" denotes clear cell, red Os and "CHR" denote chromophobe, and magenta squares and "ONC" denote Oncocytoma. (Panel A) Gene expression output from microarray data using MAS5, (Panel B) Gene expression from the first PCR experiment performed by the authors, (Panel C) Gene expression from follow-up PCR study #2 performed at a core facility, (Panel D) Comparison of expression ratios across tissues and platforms. Box and whiskers plots show the median, q1, q3, max and min values for samples grouped by subtype.