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Scanning electron microscopy of collagen fibers
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This image shows collagen, a fibrous protein that's the main component of the extracellular matrix (ECM). Collagen is a strong, ropelike molecule that forms stretch-resistant fibers. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View MediaModeling disease spread
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What looks like a Native American dream catcher is really a network of social interactions within a community. Stephen Eubank, University of Virginia Biocomplexity Institute (formerly Virginia Bioinformatics Institute) View MediaVimentin in a quail embryo
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Confocal image showing high levels of the protein vimentin (white) at the edge zone of a quail embryo. Cell nuclei are labeled green. Andrés Garcia, Georgia Tech View MediaHoneybee brain
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Insect brains, like the honeybee brain shown here, are very different in shape from human brains. Gene Robinson, University of Illinois at Urbana-Champaign. View MediaDNase
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Crystals of DNase protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View MediaGlycan arrays
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The signal is obtained by allowing proteins in human serum to interact with glycan (polysaccharide) arrays. The arrays are shown in replicate so the pattern is clear. Ola Blixt, Scripps Research Institute View MediaCas9 protein involved in the CRISPR gene-editing technology
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In the gene-editing tool CRISPR, a small strand of RNA identifies a specific chunk of DNA. Janet Iwasa View MediaCell-like compartments from frog eggs 6
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Cell-like compartments that spontaneously emerged from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. View MediaCell-like compartments from frog eggs 4
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Cell-like compartments that spontaneously emerged from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. View MediaYeast cells with accumulated cell wall material
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Yeast cells that abnormally accumulate cell wall material (blue) at their ends and, when preparing to divide, in their middles. This image was captured using wide-field microscopy with deconvolution. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View MediaCell-like compartments from frog eggs 2
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Cell-like compartments that spontaneously emerged from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. View MediaBacteriophage P22 capsid, detail
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Detail of a subunit of the capsid, or outer cover, of bacteriophage P22, a virus that infects the Salmonella bacteria. Dr. Wah Chiu, Baylor College of Medicine View MediaMouse brain 3
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Various views of a mouse brain that was genetically modified so that subpopulations of its neurons glow. Prayag Murawala, MDI Biological Laboratory and Hannover Medical School. View MediaPrecisely Delivering Chemical Cargo to Cells
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Moving protein or other molecules to specific cells to treat or examine them has been a major biological challenge. Nature Nanotechnology View MediaPetri dish containing C. elegans
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This Petri dish contains microscopic roundworms called Caenorhabditis elegans. Researchers used these particular worms to study how C. H. Robert Horvitz and Dipon Ghosh, Massachusetts Institute of Technology. View MediaElectrostatic map of the adeno-associated virus with scale
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The new highly efficient parallelized DelPhi software was used to calculate the potential map distribution of an entire virus, the adeno-associated virus, which is made up of more than 484,000 atoms. Emil Alexov, Clemson University View MediaSTORM image of axonal cytoskeleton
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This image shows the long, branched structures (axons) of nerve cells. Xiaowei Zhuang Laboratory, Howard Hughes Medical Institute, Harvard University View MediaCentromeres on human chromosomes
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Human metaphase chromosomes are visible with fluorescence in vitro hybridization (FISH). Centromeric alpha satellite DNA (green) are found in the heterochromatin at each centromere. Peter Warburton, Mount Sinai School of Medicine View MediaBacterial cells aggregated above a light-organ pore of the Hawaiian bobtail squid
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The beating of cilia on the outside of the Hawaiian bobtail squid’s light organ concentrates Vibrio fischeri cells (green) present in the seawater into aggregates near the pore-containing tis Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. View MediaBacterial symbionts colonizing the crypts of a juvenile Hawaiian bobtail squid light organ
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A light organ (~0.5 mm across) of a Hawaiian bobtail squid, Euprymna scolopes, stained blue. Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. View MediaYeast cells with endocytic actin patches
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Yeast cells with endocytic actin patches (green). These patches help cells take in outside material. When a cell is in interphase, patches concentrate at its ends. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View MediaEnzyme transition states
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The molecule on the left is an electrostatic potential map of the van der Waals surface of the transition state for human purine nucleoside phosphorylase. Vern Schramm, Albert Einstein College of Medicine of Yeshiva University View MediaBioluminescent imaging in adult zebrafish 04
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Luciferase-based imaging enables visualization and quantification of internal organs and transplanted cells in live adult zebrafish. View MediaAxolotl showing nervous system
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The head of an axolotl—a type of salamander—that has been genetically modified so that its developing nervous system glows purple and its Schwann cell nuclei appear light blue. Prayag Murawala, MDI Biological Laboratory and Hannover Medical School. View MediaChromatin in human fibroblast
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The nucleus of a human fibroblast cell with chromatin—a substance made up of DNA and proteins—shown in various colors. Melike Lakadamyali, Perelman School of Medicine at the University of Pennsylvania. View MediaX-ray crystallography (with labels)
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X-ray crystallography allows researchers to see structures too small to be seen by even the most powerful microscopes. Crabtree + Company View MediaC. elegans with blue and yellow lights in the background
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These microscopic roundworms, called Caenorhabditis elegans, lack eyes and the opsin proteins used by visual systems to detect colors. H. Robert Horvitz and Dipon Ghosh, Massachusetts Institute of Technology. View MediaYoung squids
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Real-time movie of young squids. Michael Shribak, Marine Biological Laboratory/University of Chicago. View MediaGroup of Culex quinquefasciatus mosquito larvae
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Mosquito larvae with genes edited by CRISPR. Valentino Gantz, University of California, San Diego. View MediaSelf-organizing proteins
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Under the microscope, an E. coli cell lights up like a fireball. Each bright dot marks a surface protein that tells the bacteria to move toward or away from nearby food and toxins. View MediaFinding one bug
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A nanometer-sized biosensor can detect a single deadly bacterium in tainted ground beef. How? Weihong Tan, University of Florida in Gainesville View MediaFlagellated bacterial cells
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Vibrio fischeri (2 mm in length) is the exclusive symbiotic partner of the Hawaiian bobtail squid, Euprymna scolopes. Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. View MediaSmall blood vessels in a mouse retina
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Blood vessels at the back of the eye (retina) are used to diagnose glaucoma and diabetic eye disease. They also display characteristic changes in people with high blood pressure. National Center for Microscopy and Imaging Research View MediaCapillary protein crystallization robot
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This ACAPELLA robot for capillary protein crystallization grows protein crystals, freezes them, and centers them without manual intervention. Structural Genomics of Pathogenic Protozoa Consortium View MediaSnowflake yeast 2
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Multicellular yeast called snowflake yeast that researchers created through many generations of directed evolution from unicellular yeast. William Ratcliff, Georgia Institute of Technology. View MediaProtein crystals
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Structural biologists create crystals of proteins, shown here, as a first step in a process called X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View MediaCluster analysis of mysterious protein
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Researchers use cluster analysis to study protein shape and function. Each green circle represents one potential shape of the protein mitoNEET. Patricia Jennings and Elizabeth Baxter, University of California, San Diego View MediaMagnetic Janus particle activating a T cell
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A Janus particle being used to activate a T cell, a type of immune cell. Yan Yu, Indiana University, Bloomington. View MediaMicroscopy image of bird-and-flower DNA origami
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An atomic force microscopy image shows DNA folded into an intricate, computer-designed structure. Hao Yan, Arizona State University View MediaRNase A (1)
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A crystal of RNase A protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View MediaAnnotated TEM cross-section of C. elegans (roundworm)
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The worm Caenorhabditis elegans is a popular laboratory animal because its small size and fairly simple body make it easy to study. Piali Sengupta, Brandeis University View MediaSnowflake yeast 1
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Multicellular yeast called snowflake yeast that researchers created through many generations of directed evolution from unicellular yeast. William Ratcliff, Georgia Institute of Technology. View MediaSuperconducting magnet
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Superconducting magnet for NMR research, from the February 2003 profile of Dorothee Kern in Findings. Mike Lovett View MediaGenetic mosaicism in fruit flies
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Fat tissue from the abdomen of a genetically mosaic adult fruit fly. Genetic mosaicism means that the fly has cells with different genotypes even though it formed from a single zygote. Akhila Rajan, Fred Hutchinson Cancer Center View MediaColorful communication
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The marine bacterium Vibrio harveyi glows when near its kind. Bonnie Bassler, Princeton University View MediaFly cells
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If a picture is worth a thousand words, what's a movie worth? Denise Montell, Johns Hopkins University School of Medicine View MediaWild-type and mutant fruit fly ovaries
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The two large, central, round shapes are ovaries from a typical fruit fly (Drosophila melanogaster). Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View MediaX-ray co-crystal structure of Src kinase bound to a DNA-templated macrocycle inhibitor 2
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X-ray co-crystal structure of Src kinase bound to a DNA-templated macrocycle inhibitor. Markus A. Seeliger, Stony Brook University Medical School and David R. Liu, Harvard University View MediaNetwork diagram of genes, cellular components and processes (labeled)
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This image shows the hierarchical ontology of genes, cellular components and processes derived from large genomic datasets. From Dutkowski et al. Janusz Dutkowski and Trey Ideker, University of California, San Diego View MediaBacterial alpha amylase
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A crystal of bacterial alpha amylase protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View Media