CCN1 expression in leukemia cell lines and AML bone marrow samples. (A) Western blotting for CCN1 protein expression in leukemia cell lines. (B-D) Western blotting for CCN1 protein expression in AML bone marrow samples and in normal bone marrow samples from healthy donors (#5-8: AML-M1; #13-17: AML-M2; #18-19: AML-M3; #20: AML-M4; #21-24: AML-M5). β-actin served as the loading control. BM, bone marrow.