Northeastern Illinois University 2 articles published in JoVE Editorial Using C. elegans to Monitor Proteostasis Imbalances Cindy Voisine1, Carmen Nussbaum-Krammer2 1Department of Biology, Northeastern Illinois University, 2Department of Anatomy II, Faculty of Medicine, Ludwig-Maximilians-University of Munich Engineering Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping Marie E. Kroeger1, Blaire A. Sorenson2, J. Santoro Thomas2, Emina A. Stojković1, Stefan Tsonchev2, Kenneth T. Nicholson2 1Department of Biology, Northeastern Illinois University, 2Department of Chemistry, Northeastern Illinois University A method for investigating the structure of a protein photoreceptor using atomic force microscopy (AFM) is described in this paper. PeakForce Quantitative Nanomechanical Property Mapping (PF-QNM) reveals intact protein dimers on a mica surface.