2DB4 CRYSTAL STRUCTURE OF ROTOR RING WITH DCCD OF THE V- ATPASE FROM ENTEROCOCCUS HIRAE HYDROLASE, NTPK, V-ATPASE, NA(+)-ATPASE, DCCD, PROTEOLIPID, ENTEROCOCCUS HIRAE, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI