Molecules and Cells (Mol. Cells) is an international on-line open-access journal devoted to the advancement and dissemination of fundamental knowledge in molecular and cellular biology. Reports on a broad range of topics of general interest to molecular and cell biologists are published. The journal will not publish papers that simply report cloning and sequencing of a gene or preliminary X-ray crystallographic analysis without providing evidences for further biological significance. It is published monthly by the Korean Society for Molecular and Cellular Biology (KSMCB).