This database from the University of California and the San Diego Supercomputer Center "is part of the Plant Genome Program for the National Science Foundation." The information contained within the site focuses on genes involved in transport and uptake of plant nutrients. Users can perform a variety of different searches and limit the results by species, if desired. Users can also register to take advantage of certain customizing features. Although there are educational features, this site is primarily for an audience with advanced knowledge of plant genetics.