UCSD Molecule Pages is a bi-annual journal which publishes structured, expert- authored reviews on cell signaling proteins across different species. The expert authors are typically approached by one of the editorial board members to write a Molecule Page. However, we encourage researchers to submit applications to write a Molecule Page. Upon submission, the complete review along with author-entered bioinformatics data is sent to scientific experts for peer-review process. This online journal is also available on the Signaling Gateway project website: www.signalinggateway.org.