Typical images showed the expression level and localization of SAM68 protein as examined by immunohistochemistry (IHC). (A) Series showed the negative, low level and high level expression of SAM68 protein. Left panel: 200×; right panel: 400×. (B) Three types of SAM68 expression according to the intracellular localization: nucleus expression, cytoplasm expression and nucleus-cytoplasm co-expression. Left panel: 400×; right panel: 800 × .