Correlation between UGT1A9 protein and mRNA levels (A); mRNA levels and glucuronidation activity of propofol (B), sorafenib (D), and mycophenolic acid (F); protein levels and glucuronidation activity of propofol (C), sorafenib (E), and mycophenolic acid (G) in normal (N, ●) and tumor (T, ⬜) kidneys. The correlation coefficients r2 were determined using a Spearman correlation test. N.S., not significant.