I am looking for protein protein (or gene gene) interaction databases where the interactions (edges) between the interactors are well defined, I mean the edge should be either a pathway or known molecular reaction and not just the type of assay or pmid references for the interaction . Based on this I have narrowed my selection to KEGG, Reactome and I am currently looking through humancyc. Do you know about any other interaction database where I can get this information ? I have already gone through usual String, IntAct, MIP ... databases and I couldn't find this information on most them. I am looking for human or mouse interaction data.