2Z04 LYASE, PURINE NUCLEOTIDE BIOSYNTHETIC PATHWAY, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, METABOLIC SYSTEMS, ATP-BINDING, DECARBOXYLASE, NUCLEOTIDE-BINDING, PURINE BIOSYNTHESIS, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI CRYSTAL STRUCTURE OF PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE ATPASE SUBUNIT FROM AQUIFEX AEOLICUS