3L0G TRANSFERASE, SSGCID, NIH, NIAID, SBRI, UW, EMERALD BIOSTRUCTURES, ALS COLLABORATIVE CRYSTALLOGRAPHY, EHRLICHIA CHAFFEENSIS, NICOTINATE-NUCLEOTIDE PYROPHOSPHORYLASE, GLYCOSYLTRANSFERASE, STRUCTURAL GENOMICS, SEATTLE STRUCTURAL GENOMICS CENTER FOR INFECTIOUS DISEASE CRYSTAL STRUCTURE OF NICOTINATE-NUCLEOTIDE PYROPHOSPHORYLASE FROM EHRLICHIA CHAFFEENSIS AT 2.05A RESOLUTION