The nodes represented on KEGG KGML files have homologues and therefore a specific node of a certain pathway can map to two or more other gene products, which are collapsed into one node in the KGML file. I need to expand the nodes PRIOR to importing the file to cytoscape, as it is not possible to expand them once inside cytoscape. the reason for this is that cytoscape reads collapsed nodes (from kgml) as one node with synonymous labels, as opposed to homologues.