Recombinant Hsp70/Hsc70 nnReacts with inducible and constitutive Hsp70/Hsc70 of human, mouse, rat, rabbit, monkey, guinea pig, hamster, chicken, bovine, canine, ovine, porcine, fish, Xenopus, Drosophila, C. elegans, and plants. The epitope is in the region of amino acids 503-640 of human Hsp70.