BIRCS expression in ATL patient samples. (A) The relative level of BIRC5 (top panel) and actin (bottom panel) expression obtained from the U133A2.0 arrays was graphed for the indicated ATL or control (CD4⁺) samples. (B) BIRC5 protein expression was analyzed in ATL or CD4⁺ whole-cell extracts by Western blot with antibodies to BIRC5 (top panel) or actin (bottom panel).