Structural Model of Bacterial and Eukaryotic Microtubules 
Reference: Pilhofer M, Ladinsky MS, McDowall AW, Petroni G, Jensen GJ (2011) Microtubules in Bacteria: Ancient Tubulins Build a Five-Protofilament Homolog of the Eukaryotic Cytoskeleton. PLoS Biol 9(12): e1001213. doi:10.1371/journal.pbio.1001213
Copyright: © 2011 Pilhofer et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Identify a recent research article (not review) that uses either confocal microscopy or super-resolution microscopy as one of the study's techniques. Explain briefly (1 paragraph) how the microscopy technique specifically contributed to the article's findings.
This study examined the chemotherapeutic drug doxorubicin (DOX) with the novel sixth-generation cationic poly-l-lysine dendrimer (DM) and determined enhanced therapeutic efficacy of DOX when complexed to DM in tumour-bearing mice. Confocal microscopy allowed evaluation of the depth of distribution of both drugs (DOX and DOX-DM) into the Multicellular Tumour Spheroids (MTS)bu the following method. For each image, intensity from background fluorescence was obtained from untreated MTS and subtracted from total intensity. The total fluoresence intensity was then calculated in each region of interest and plotted as a function of the distance from the spheroid rim. 
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Referencing: 1. find the number, remove colon.
2. Put pubmed code at front and end.
3. Put ref code at front and end