Escherichia coli purine nucleoside phosphorylase II, the product of the xapA gene

triangular monochromator, bent mirror
(information from the Web-site)

MSQVQFSHNPLFCIDIIKTYKPDFTPRVAFILGSGLGALADQIENAVAISYEKLPGFPVSTVHGHAGELVLGHLQGVPVV
CMKGRGHFYEGRGMTIMTDAIRTFKLLGCELLFCTNAAGSLRPEVGAGSLVALKDHINTMPGTPMVGLNDDRFGERFFSL
ANAYDAEYRALLQKVAKEEGFPLTEGVFVSYPGPNFETAAEIRMMQIIGGDVVGMSVVPEVISARHCDLKVVAVSAITNM
AEGLSDVKLSHAQTLAAAELSKQNFINLICGFLRKIA

Tris, PEG4K, pH 8.2, VAPOR DIFFUSION, SITTING DROP, temperature 294K

Escherichia coli purine nucleoside phosphorylase II, orthorhombic crystal form with xanthine and phosphate

a hexamer with 32 point symmetry that results from the dimerization of trimers

purine nucleoside phosphorylase guanine xanthine, TRANSFERASE