Phylogenetic analyses based on both nucleotide and protein data demonstrated that HSP 90 ( AA+AB+B ) formed a monophyletic clade , whereas TRAP is a relatively distant paralogue of this clade . . ^^^ Six genes , HSP90AA1 , HSP90AA2 , HSP90N , HSP90AB1 , HSP90B1 and TRAP 1 , were recognized as functional , and the remaining 11 genes were considered putative pseudogenes . ^^^ Amino acid polymorphic variants were detected for genes HSP90AA1 , HSP90AA2 , HSP90AB1 , HSP90B1 , and TRAP 1 . ^^^ Classes HSP90AA , HSP90AB , HSP90B , and TRAP contain 7 , 6 , 3 , and 1 genes , respectively . ^^^ HSP90AA genes mapped onto chromosomes 1 , 3 , 4 , and 11 ; HSP90AB genes mapped onto 3 , 4 , 6 , 13 and 15 ; HSP90B genes mapped onto 1 , 12 , and 15 ; and the TRAP 1 gene mapped onto 16 . ^^^ |