In order to make EXPOLDB a comprehensive database, we have incorporated data from other databases. To keep pace with the updation of information available at the source databases, we have devised a standard updation protocol. The data from other databases will be updated every six months or depending on the updation at the source database, whichever is later

EST and Tissue expression Data
We have automated the procedure to classify the genes expressed in blood into different expression categories. This will be done twice in a year. The EST and tissue expression data available at the UniGene database will be used as the source data for this analysis.

Annotation Data
To keep consistency in annotation data we have taken the annotation data from Affymetrix database, and hence will be updated as per the updation in the Affymetrix annotation files.

Expression Data from our studies
We are carrying out more experiments on human individuals using the Affymetrix arrays. We will incorporate this data into EXPOLDB on completion of the experiments.

Expression Data from other sources
The incorporation of expression data from other databases will depend upon the availability of the published data. Only Affymetrix microarray data on human individuals will be incorporated. A standard procedure will be adopted to filter the genes (as per the instructions at the source database). Only the genes that had a present (P) call in all the experiments will be considered. Mean expression and CV for the genes will be calculated as described in the ‘System and Methods’ section in the manuscript or ‘Data Sources’ page on the EXPOLDB web site