BioProbes 58, the April 2009 issue of a newsletter published by !%Invitrogen Corp.%!, features articles on detecting DNA fragmentation using the Click-iT Tunel assays, fluorescence technologies for high-content imaging and analysis, and novel solid-phase antibody labeling. Available in print or pdf, the 32-page publication includes application-related articles on western blots, dynamic signaling by integrins, and modeling mammary cell function in three dimensions. The company’s newest cellular analysis products and technologies are highlighted.