You can find more information about Cyt b5 reductase using the following links:

PFID PFID Old Formal Annotation PlasmoDB TDR Targets Subcellular Localization Affecting Drugs
Drug Name PubMed Articles (year of publication)
PF3D7_1367500 PF13_0353 NADH-cytochrome b5 reductase, putative PlasmoDB TDR
Expasy - NiceZime View
Brenda - The Comprehensive Enzyme Information System