NCBI generated annotation is available for many records. These annotations are derived by extracting stable sequence identification information from the Platform and periodically querying against the Entrez Gene and UniGene databases to generate consistent and up-to-date annotation. Gene symbol and Gene title annotations are selected by default. Other categories of NCBI generated annotation include GO terms and chromosomal location information.
Submitter supplied annotation is available for all records. These represent the original Platform annotations provided by the submitter. Note that there is a lot of diversity in the style and content of submitter supplied annotations and they may not have been updated since the time of submission.
http://www.ncbi.nlm.nih.gov/geo/info/geo2r.html
GEO2R is an interactive web tool that allows users to compare two or more groups of Samples in a GEO Series in order to identify genes that are differentially expressed across experimental conditions. Results are presented as a table of genes ordered by significance.
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