TRANSFERASE, BACILLUS SUBTILIS, PAS DOMAIN, ALKALINE PHOSPHATASE SYNTHESIS SENSOR PROTEIN PHOR, STRUCTURAL GENOMICS, PSI-2, PROTEIN STRUCTURE INITIATIVE, MIDWEST CENTER FOR STRUCTURAL GENOMICS, MCSG, KINASE, MEMBRANE, PHOSPHATE TRANSPORT, PHOSPHOPROTEIN, TRANSMEMBRANE, TRANSPORT, TWO- COMPONENT REGULATORY SYSTEM 3CWF CRYSTAL STRUCTURE OF PAS DOMAIN OF TWO-COMPONENT SENSOR HISTIDINE KINASE