Although CX+ (36.4 ± 4.8 ng) and CX− (32.9 ± 5.0 ng) tumor sublines revealed similar cytosolic Hsp70 levels (Fig. 1a and c), the tumor sublines differed significantly in their mHsp70 expression under non-stressed conditions (sham; Fig. 2a). This evidence concerns the gene HSPA1A and neoplasm.