I have a protein list extracted from microarray data and I am trying to find their interaction together. I got a network from STRING. my question is what should I do after extracting this network, what is the statistical test to be done on this network to show its biological significance.
You can try analyzing your protein list with NetworkAnalyst. It allows you to perform ORA enrichment analysis, module detection and several other features on your STRING network. Disclaimer: I am involved with the project.