PlantCyc is a metabolic pathway reference database containing more than 500 pathways and their catalytic enzymes and genes, as well as compounds from over 300 plant species (See Database Statistics).
The majority of the pathways have been curated from experimental literature by curators at the PMN and collaborators' sites. In addition, PlantCyc includes hypothetical pathways that are published in peer-reviewed journals based on the educated conjectures of experts, and cmputationally predicted pathways that have been manually validated by PMN curtors.
Similarly, enzymes in PlantCyc may have experimental support or may be based solely on computational predictions.
For both pathways and enzymes, evidence codes are assigned to clearly indicate the type of support associated with these database items.