You can find more information about DNA-directed RNA polymerase using the following links:

PFID PFID Old Formal Annotation PlasmoDB TDR Targets Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_1125300 PF11_0264 DNA-directed RNA polymerase PlasmoDB TDR
Rifampins
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System