sure Hsp90N LZ pls refer one review: PMID 19179103 by Li Y et al. (2009). Drug Resist Updat. 12: 17-27. its pp22 right column bottom: >Another cytoplasmic variant in mammals, Hsp90N, completely lacks the N- terminal ATPase domain and appears to be membrane associated (Grammatikakis et al., 2002). Higher eukaryotes possess a distinct endoplasmic-reticulum isoform, Grp94 (Ni and Lee, 2007) and a mitochondrial isoform, Trap1 (Felts et al., 2000). Neither clientele nor the biological role of these isoforms is currently known.