### Description

This column shows the similarity of the expression of each gene to the selected gene. Genes with identical expression profiles show a value of zero. This column shows data only for the 1000 genes (including splicing variants) that have the most similar expression profiles.

### Methods

The expression distance between two genes is a weighted sum computed with the following formula:

         delta(a,b) = sum(w[i] * |a[i] - b[i]| ) / sum(w[i])

where a and b are expression vectors associated with the two genes indexed by tissue, w is an array of weights, and the sums are taken over all tissues. All tissues are weighted 1.0.