You can find more information about Otu1 using the following links:

PFID PFID Old Formal Annotation PlasmoDB TDR Targets Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_0923100 PFI1135c OTU-like cysteine protease, putative PlasmoDB TDR
PF3D7_1031400 PF10_0308 OTU-like cysteine protease PlasmoDB TDR
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System