The Diurnal Project is published in Cold Spring Harbor Laboratory Symposium 72 - Clocks and Rhythms

The DIURNAL project (http://diurnal.cgrb.oregonstate.edu/) provides a graphical interface for mining and viewing diurnal and circadian microarray data for Arabidopsis thaliana, poplar and rice. The database is searchable and provides access to several user-friendly web-based data-mining tools with easy-to-understand output. The associated tools include HAYSTACK (http://haystack.cgrb.oregonstate.edu/) and ELEMENT (http://element.cgrb.oregonstate.edu/). HAYSTACK is a model-based pattern matching algorithm for identifying genes that are co-expressed and potentially co-regulated. HAYSTACK can be used to analyze virtually any large-scale microarray dataset, and provides an alternative method for clustering microarray data from any experimental system, by grouping together genes whose expression patterns match the same or similar user-defined patterns. ELEMENT is a web-based program for identifying potential cis-regulatory elements in the promoters of co-regulated genes in Arabidopsis, poplar, and rice. Together, DIURNAL, HAYSTACK, and ELEMENT can be used to facilitate cross-species comparisons among the plant species supported and to accelerate functional genomics efforts in the laboratory.

View at cshl-sympodium.org.