CRYSTAL STRUCTURE OF A HISTIDINE TRIAD FAMILY PROTEIN FROM ENTAMOEBA HISTOLYTICA, BOUND TO GMP 3OXK METAL BINDING PROTEIN, SSGCID, NIH, NIAID, SBRI, UW, EMERALD BIOSTRUCTURES, PUTATIVE HYDROLASE, STRUCTURAL GENOMICS, SEATTLE STRUCTURAL GENOMICS CENTER FOR INFECTIOUS DISEASE