What databases are available for gene regulatory network graphs starting from a given gene? For example, starting from p53 gene, where can I find a gene regulatory network image that can be exported or embedded to another website?
If you can't afford ingenuity, KEGG has branched out into regulatory networks as well. Here's the link to their version of the pathway.
Its free to use as a reference and for academic research.
I highly recommend you to visit Pathguide to get a sense of how vast is the catalog of Pathway Databases. Looking into the category Pathway Diagrams or in Transcription Factors / Gene Regulatory Networks should help in your task.
I would start by looking at these DataBases:
If you are working with a species other than human, perhaps you'll find a more suitable database in PathGuide.
PS: Sorry New user limitations impede me to post more than two links :/