MOTIVATION: Protein interaction networks contain a wealth of biological information, but their large size often hinders cross-organism comparisons. We present OrthoNets, a Cytoscape plugin that displays protein-protein interaction (PPI) networks from two organisms simultaneously, highlighting orthology relationships and aggregating several types of biomedical annotations. OrthoNets also allows PPI networks derived from experiments to be overlaid on networks extracted from public databases, supporting the identification and verification of new interactors. Any newly identified PPIs can be validated by checking whether their orthologs interact in another organism. AVAILABILITY: OrthoNets is freely available at http://wodaklab.org/orthonets/.

Airborne HYMAP data were used to estimate the sideroxylonal-A concentration from the canopy reflectance of Eucalyptus melliodora. Modified partial least squares (MPLS) was applied to the extracted mean and maximum canopy spectra to estimate the sideroxylonal-A concentrations. The resultant coefficients of determination (R/sup 2/) are high (e.g. 0.89 in one case), and the identified absorption features (wavelengths) are closely consistent with those identified in a previous study in which near IR spectroscopy was used to measure the sideroxylonal-A concentration of ground freeze-dried leaves, and a spectroradiometer was used to estimate the sideroxylonal-A concentration of whole oven-dried leaves and fresh whole leaves.