You can find more information about Sir2 using the following links:

PFID PFID Old Formal Annotation GeneDB PlasmoDB Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_1328800 PF13_0152 transcriptional regulatory protein sir2a GeneDB PlasmoDB
Nicotinamide
PF3D7_1451400 PF14_0489 transcriptional regulatory protein sir2b GeneDB PlasmoDB
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System