Are there any databases for gene co-expression or expression pattern clustering? I am currently working on gene clustering based on co-expression pattern in mouse brain. The problem is I do not have some solid way to test my result. Are there any suggestions for databases indicating groups of genes that co-express (in mouse brain), or even better indicating some similarity metrics between each pair of genes based on expression pattern?
Also, I do want some databases for differentially-expressed genes ;)
PS: By &quot;differentially-expressed&quot; I am referring to a pair of genes whose expression patterns in a single individual differ.
How about:

http://www.informatics.jax.org/expression.shtml
http://www.emouseatlas.org/emage/home.php

Other potential databases of interest:

https://biokeanos.com/search?q=co-expression+%2Bmouse