BIRC7 and adrenal cortex neoplasm: To better investigate the expression of livin isoforms in adrenal tissues, we compared livin α and livin β expression at mRNA level by RT-PCR (size differentiation agarose gel electrophoresis) (Figure 2A–2B) and protein level by Western Blot (WB) analysis (Figure 2C–2D) in 15 paired samples of adrenocortical tumors (10 ACA and 5 ACC) and adjacent adrenal glands.