The BioVelo query language is as flexible as SQL (Structured Query
Language for relational databases), but
based on a simpler syntax and semantics.
Online documentation for the BioVelo language is available at
BioVelo language description.
An online web interface is available based on BioVelo -- it can be used
without knowing its syntax. Here is a snapshot of this web interface (Safari browser).
For more information and do online queries: BioCyc Advanced Query
The following image is an overview of the E. coli
transcriptional regulatory network from version 11.5 of
Pathway Tools. A subset of the regulatory relations is shown with
green arcs. The innermost ellipse is composed of genes that have no
regulators. The outermost ellipse has genes that do not regulate any
gene. The inner ellipse has genes that regulate and are
regulated. On the outer ellipse, genes that are regulated by the same
set of genes are combined together and displayed in the form of a
triangle. There are over 1800 genes in this overview -- most of them
are not transciptional regulators and are therefore on the outermost ellipse.