Web sites that explain the basic and advanced techniques. Interpreting the red, yellow, and green spots of a DNA gene expression microarray can be tricky. Fortunately, international standards for microarray experiments and information storage databases are being developed, which will help scientists worldwide share individual laboratory microarray data. But what is a microarray? The Web offers a wealth of information describing microarrays and how they are used, along with examples, protocols, analysis software, databases, and standards that help in reading microarray signal spots. The best place to start is the European Bioinformatics Institute's online slideshow (http://industry.ebi.ac.uk/～alan/MicroArray/IntroMicroArrayTalk/sld001.htm), which describes how a microarray is prepared and used to detect complementary DNA (cDNA), the different DNA microarray technologies, and the various microarray gene expression experiments.
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