HspBP polypeptides and peptide fragments that bind Hsp 70

Human heat-shock protein-binding proteins (HspBP-1 and HspBP-2) and fragments thereof are disclosed with the polynucleotides which identify and encode them. Genetically engineered expression vectors and host cells comprising the nucleic acid sequences encoding heat-shock protein-binding proteins (HspBP) are also disclosed and a method for producing HspBP polypeptides.