HSPA1A and neoplasm: MemHsp70 expression by different human tumor cell lines and the relationship between memHsp70 expression and the ability to bind a 14-mer peptide TPP matching an epitope within the oligomerization domain of the Hsp70 molecule (aa 450–463 TKDNNLLGRFELSG, abbreviation TPP) were determined by flow cytometry at 4°C (Fig. 1).