Dear colleagues, We would like to announce the availability of mmView - the web-based application which allows to comfortably explore the structural data of biomacromolecules stored in the mmCIF (macromolecular Crystallographic Information File) format. The mmView software system is primarily intended for educational purposes but it can also serve as an auxiliary tool for working with biomolecular structures. The mmView application is offered in two flavors: as a publicly available web server http://ich.vscht.cz/projects/mmview/, and as an open-source stand-alone application (available from http://sourceforge.net/projects/mmview) that can be installed on the user’s computer. Petr Cech and Daniel Svozil -- Daniel Svozil, PhD Head of Laboratory of Informatics and Chemistry Institute of Chemical Technology Czech Republic phone: +420 220 444 391 http://ich.vscht.cz/~svozil