The binding characteristics of the cmHsp70.1 and cmHsp70.2 mAbs with respect to their capacity to detect free and lipid-bound Hsp70 were compared with those of two commercially available Hsp70 control antibodies (ctrl Hsp70A, ctrl Hsp70B) using Western and dot blot analysis of HSP proteins and flow cytometric analysis of viable, membrane Hsp70-positive tumor cells. Here, HSP90B2P is linked to neoplasm.