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RNA interference
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RNA interference or RNAi is a gene-silencing process in which double-stranded RNAs trigger the destruction of specific RNAs. Crabtree + Company View Media
Petri 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 Media
Golden gene chips
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A team of chemists and physicists used nanotechnology and DNA's ability to self-assemble with matching RNA to create a new kind of chip for measuring gene activity. Hao Yan and Yonggang Ke, Arizona State University View Media
Nucleolus subcompartments spontaneously self-assemble 3
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What looks a little like distant planets with some mysterious surface features are actually assemblies of proteins normally found in the cell's nucleolus, a small but very important protein complex lo Nilesh Vaidya, Princeton University View Media
Antitoxin GhoS (Illustration 1)
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Structure of the bacterial antitoxin protein GhoS. GhoS inhibits the production of a bacterial toxin, GhoT, which can contribute to antibiotic resistance. Rebecca Page and Wolfgang Peti, Brown University and Thomas K. Wood, Pennsylvania State University View Media
Plasma membrane (with labels)
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The plasma membrane is a cell's protective barrier. See image 2523 for an unlabeled version of this illustration. Featured in The Chemistry of Health. Crabtree + Company View Media
Retroviruses as fossils
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DNA doesn't leave a fossil record in stone, the way bones do. Instead, the DNA code itself holds the best evidence for organisms' genetic history. Emily Harrington, science illustrator View Media
Cellular traffic
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Like tractor-trailers on a highway, small sacs called vesicles transport substances within cells. This image tracks the motion of vesicles in a living cell. Alexey Sharonov and Robin Hochstrasser, University of Pennsylvania View Media
Arabidopsis Thaliana: Flowers Spring to Life
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This image capture shows how a single gene, STM, plays a starring role in plant development. Nathanaёl Prunet NIH Support: National Institute of General Medical Sciences View Media
Fruit fly ovary
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In this image of a stained fruit fly ovary, the ovary is packed with immature eggs (with DNA stained blue). The cytoskeleton (in pink) is a collection of fibers that gives a cell shape and support. Crystal D. Rogers, Ph.D., University of California, Davis, School of Veterinary Medicine; and Mariano A. Loza-Coll, Ph.D., California State University, Northridge. View Media
Mosaicism in C. elegans (Black Background)
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In the worm C. elegans, double-stranded RNA made in neurons can silence matching genes in a variety of cell types through the transport of RNA between cells. Snusha Ravikumar, Ph.D., University of Maryland, College Park, and Antony M. Jose, Ph.D., University of Maryland, College Park View Media
Zebrafish embryo showing vasculature
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A zebrafish embryo. The blue areas are cell bodies, the green lines are blood vessels, and the red glow is blood. Kevin Eliceiri, University of Wisconsin-Madison. View Media
Normal vascular development in frog embryos
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In vivo vascular development in kdr:GFP frogs. Related to images 3403 and 3405. Hye Ji Cha, University of Texas at Austin View Media
Isolated Planarian Pharynx
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The feeding tube, or pharynx, of a planarian worm with cilia shown in red and muscle fibers shown in green View Media
Kluyveromyces polysporus Argonaute bound to guide RNA
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A segment of siRNA, shown in red, guides a "slicer" protein called Argonaute (multi-colored twists and corkscrews) to the target RNA molecules. Kotaro Nakanishi and David Weinberg, Massachusetts Institute of Technology View Media
Circadian rhythm
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The human body keeps time with a master clock called the suprachiasmatic nucleus or SCN. Crabtree + Company View Media
Wound healing in process
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Wound healing requires the action of stem cells. Hermann Steller, Rockefeller University View Media
Natcher Building 07
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NIGMS staff are located in the Natcher Building on the NIH campus. Alisa Machalek, National Institute of General Medical Sciences View Media
Seeing signaling protein activation in cells 03
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Cdc42, a member of the Rho family of small guanosine triphosphatase (GTPase) proteins, regulates multiple cell functions, including motility, proliferation, apoptosis, and cell morphology. Klaus Hahn, University of North Carolina, Chapel Hill Medical School View Media
Multicolor STORM
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In 2006, scientists developed an optical microscopy technique enabling them to clearly see individual molecules within cells. In 2007, they took the technique, abbreviated STORM, a step further. Xiaowei Zhuang, Harvard University View Media
Cytochrome structure with anticancer drug
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This image shows the structure of the CYP17A1 enzyme (ribbons colored from blue N-terminus to red C-terminus), with the associated heme colored black. Emily Scott, University of Kansas View Media
Human aspartoacylase
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Model of aspartoacylase, a human enzyme involved in brain metabolism. Center for Eukaryotic Structural Genomics, PSI View Media
Animal cell
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A typical animal cell, sliced open to reveal a cross-section of organelles. Judith Stoffer View Media
PSI: from genes to structures
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The goal of the Protein Structure Initiative (PSI) is to determine the three-dimensional shapes of a wide range of proteins by solving the structures of representative members of each protein family f National Institute of General Medical Sciences View Media
Yeast 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 Media
Bioluminescent imaging in adult zebrafish - lateral and overhead view
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Luciferase-based imaging enables visualization and quantification of internal organs and transplanted cells in live adult zebrafish. Kenneth Poss, Duke University View Media
Hippocampal neuron in culture
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Hippocampal neuron in culture. Dendrites are green, dendritic spines are red and DNA in cell's nucleus is blue. Shelley Halpain, UC San Diego View Media
Autofluorescent xanthophores in zebrafish skin
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Pigment cells are cells that give skin its color. David Parichy, University of Washington View Media
Leptospira bacteria
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Leptospira, shown here in green, is a type (genus) of elongated, spiral-shaped bacteria. Infection can cause Weil's disease, a kind of jaundice, in humans. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media
Wound healing in process
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Wound healing requires the action of stem cells. Hermann Steller, Rockefeller University View Media
ATP synthase (with labels)
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The world's smallest motor, ATP synthase, generates energy for the cell. See image 2517 for an unlabeled version of this illustration. Crabtree + Company View Media
Arachnoidiscus diatom
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An Arachnoidiscus diatom with a diameter of 190µm. Michael Shribak, Marine Biological Laboratory/University of Chicago. View Media
Tetrapolar mitosis
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This image shows an abnormal, tetrapolar mitosis. Chromosomes are highlighted pink. The cells shown are S3 tissue cultured cells from Xenopus laevis, African clawed frog. Gary Gorbsky, Oklahoma Medical Research Foundation View Media
Mapping disease spread
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How far and fast an infectious disease spreads across a community depends on many factors, including transportation. These U.S. David Chrest, RTI International View Media
Yeast cells pack a punch
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Although they are tiny, microbes that are growing in confined spaces can generate a lot of pressure. In this video, yeast cells grow in a small chamber called a microfluidic bioreactor. Oskar Hallatschek, UC Berkeley View Media
Fluorescence in situ hybridization (FISH) in mouse ES cells shows DNA interactions
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Researchers used fluorescence in situ hybridization (FISH) to confirm the presence of long range DNA-DNA interactions in mouse embryonic stem cells. Kathrin Plath, University of California, Los Angeles View Media
Pig trypsin (3)
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Crystals of porcine trypsin protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View Media
Bacillus anthracis being killed
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Bacillus anthracis (anthrax) cells being killed by a fluorescent trans-translation inhibitor, which disrupts bacterial protein synthesis. Kenneth Keiler, Penn State University View Media
A Growing Bacterial Biofilm
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A growing Vibrio cholerae (cholera) biofilm. Cholera bacteria form colonies called biofilms that enable them to resist antibiotic therapy within the body and other challenges to their growth. Jing Yan, Ph.D., and Bonnie Bassler, Ph.D., Department of Molecular Biology, Princeton University, Princeton, NJ. View Media
Bacterial glucose isomerase
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A crystal of bacterial glucose isomerase protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View Media
CRISPR Illustration Frame 1
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This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. This is the first frame in a series of four. National Institute of General Medical Sciences. View Media
Active site of sulfite oxidase
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Sulfite oxidase is an enzyme that is essential for normal neurological development in children. John Enemark, University of Arizona View Media
Cas9 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 Media
Yeast cells responding to a glucose shortage
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These yeast cells were exposed to a glucose (sugar) shortage. Mike Henne, University of Texas Southwestern Medical Center. View Media
Cellular polarity
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As an egg cell develops, a process called polarization controls what parts ultimately become the embryo's head and tail. This picture shows an egg of the fruit fly Drosophila. Wu-Min Deng, Florida State University View Media
Dolly the sheep
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Scientists in Scotland were the first to clone an animal, this sheep named Dolly. She later gave birth to Bonnie, the lamb next to her. View Media
Molecular interactions
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This network map shows molecular interactions (yellow) associated with a congenital condition that causes heart arrhythmias and the targets for drugs that alter these interactions (red and blue). Ravi Iyengar, Mount Sinai School of Medicine View Media
Influenza virus attaches to host membrane
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Influenza A infects a host cell when hemagglutinin grips onto glycans on its surface. Crabtree + Company View Media
Cluster 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 Media
H1 histamine receptor
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The receptor is shown bound to an inverse agonist, doxepin. Raymond Stevens, The Scripps Research Institute View Media
