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X-ray co-crystal structure of Src kinase bound to a DNA-templated macrocycle inhibitor 3
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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 MediaMovie of in vitro assembly of a cell-signaling pathway
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T cells are white blood cells that are important in defending the body against bacteria, viruses and other pathogens. Xiaolei Su, HHMI Whitman Center of the Marine Biological Laboratory View MediaRNA 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 MediaBeta-galactosidase montage showing cryo-EM improvement--gradient background
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Composite image of beta-galactosidase showing how cryo-EM’s resolution has improved dramatically in recent years. Older images to the left, more recent to the right. Veronica Falconieri, Sriram Subramaniam Lab, National Cancer Institute View MediaA panorama view of cells
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This photograph shows a panoramic view of HeLa cells, a cell line many researchers use to study a large variety of important research questions. Tom Deerinck, National Center for Microscopy and Imaging Research View MediaCytochrome 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 MediaBorrelia burgdorferi
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Borrelia burgdorferi is a spirochete, a class of long, slender bacteria that typically take on a coiled shape. Infection with this bacterium causes Lyme disease. Tina Weatherby Carvalho, University of Hawaii at Manoa View MediaInduced stem cells from adult skin 01
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These cells are induced stem cells made from human adult skin cells that were genetically reprogrammed to mimic embryonic stem cells. James Thomson, University of Wisconsin-Madison View MediaTaste buds signal different tastes through ATP release
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Taste buds in a mouse tongue epithelium with types I, II, and III taste cells visualized by cell-type-specific fluorescent antibodies. Aki Taruno, Perelman School of Medicine, University of Pennsylvania View MediaBrains of sleep-deprived and well-rested fruit flies
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On top, the brain of a sleep-deprived fly glows orange because of Bruchpilot, a communication protein between brain cells. These bright orange brain areas are associated with learning. Chiara Cirelli, University of Wisconsin-Madison View MediaFruit fly embryo
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Cells in an early-stage fruit fly embryo, showing the DIAP1 protein (pink), an inhibitor of apoptosis. Hermann Steller, Rockefeller University View MediaStructure of telomerase
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Scientists recently discovered the full molecular structure of telomerase, an enzyme important to aging and cancer. Jiansen Jiang, Edward J. Miracco, Z. Hong Zhou and Juli Feigon, University of California, Los Angeles; Kathleen Collins, University of California, Berkeley View MediaInduced pluripotent stem cells from skin 02
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These induced pluripotent stem cells (iPS cells) were derived from a woman's skin. Blue show nuclei. Green show a protein found in iPS cells but not in skin cells (NANOG). Kathrin Plath lab, University of California, Los Angeles, via CIRM 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 MediaAlternative splicing (with labels)
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Arranging exons in different patterns, called alternative splicing, enables cells to make different proteins from a single gene. Featured in The New Genetics. Crabtree + Company View MediaNetwork Map
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This network map shows the overlap (green) between the long QT syndrome (yellow) and epilepsy (blue) protein-interaction neighborhoods located within the human interactome. Seth Berger, Mount Sinai School of Medicine View MediaMeiosis illustration (with labels)
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Meiosis is the process whereby a cell reduces its chromosomes from diploid to haploid in creating eggs or sperm. Crabtree + Company View MediaAlternative splicing
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Arranging exons in different patterns, called alternative splicing, enables cells to make different proteins from a single gene. Crabtree + Company View MediaCircadian rhythm neurons in the fruit fly brain
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Some nerve cells (neurons) in the brain keep track of the daily cycle. This time-keeping mechanism, called the circadian clock, is found in all animals including us. Justin Blau, New York University View MediaMitochondria from rat heart muscle cell_2
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These mitochondria (brown) are from the heart muscle cell of a rat. Mitochondria have an inner membrane that folds in many places (and that appears here as striations). National Center for Microscopy and Imaging Research View MediaIntasome
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Salk researchers captured the structure of a protein complex called an intasome (center) that lets viruses similar to HIV establish permanent infection in their hosts. National Resource for Automated Molecular Microscopy http://nramm.nysbc.org/nramm-images/ Source: Bridget Carragher View MediaYeast cells with nuclei and contractile rings
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Yeast cells with nuclei shown in green and contractile rings shown in magenta. Nuclei store DNA, and contractile rings help cells divide. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. View MediaCancer Cells Glowing from Luciferin
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The activator cancer cell culture, right, contains a chemical that causes the cells to emit light when in the presence of immune cells. Mark Sellmyer, Stanford University School of Medicine View MediaO2 reacting with a flavin-dependent enzyme
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Department of Biological Chemistry, University of Michigan View MediaNerve ending
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A scanning electron microscope picture of a nerve ending. It has been broken open to reveal vesicles (orange and blue) containing chemicals used to pass messages in the nervous system. Tina Weatherby Carvalho, University of Hawaii at Manoa View MediaSpreading Cells 01
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Cells move forward with lamellipodia and filopodia supported by networks and bundles of actin filaments. Proper, controlled cell movement is a complex process. Rong Li and Praveen Suraneni, Stowers Institute for Medical Research View MediaDeveloping Arabidopsis flower buds
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Flower development is a carefully orchestrated, genetically programmed process that ensures that the male (stamen) and female (pistil) organs form in the right place and at the right time in the flowe Nathanaël Prunet, Caltech View MediaCarbon building blocks
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The arrangement of identical molecular components can make a dramatic difference. For example, carbon atoms can be arranged into dull graphite (left) or sparkly diamonds (right). Crabtree + Company View MediaNucleotides make up DNA
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DNA consists of two long, twisted chains made up of nucleotides. Each nucleotide contains one base, one phosphate molecule, and the sugar molecule deoxyribose. Crabtree + Company View MediaFrom DNA to Protein (labeled)
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The genetic code in DNA is transcribed into RNA, which is translated into proteins with specific sequences. Crabtree + Company View MediaRelapsing fever bacterium (gray) and red blood cells
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Relapsing fever is caused by a bacterium and transmitted by certain soft-bodied ticks or body lice. The disease is seldom fatal in humans, but it can be very serious and prolonged. NIAID View MediaPathways – Bacteria vs. Viruses: What's the Difference?
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Learn about how bacteria and viruses differ, how they each can make you sick, and how they can or cannot be treated. National Institute of General Medical Sciences View MediaCRISPR Illustration
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This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. National Institute of General Medical Sciences. View MediaTwo-headed Xenopus laevis tadpole
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Xenopus laevis, the African clawed frog, has long been used as a research organism for studying embryonic development. Michael Klymkowsky, University of Colorado, Boulder View MediaLos ritmos circadianos y el núcleo supraquiasmático
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Los ritmos circadianos son cambios físicos, mentales y de comportamiento que siguen un ciclo de 24 horas. NIGMS View MediaZebrafish larva
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You are face to face with a 6-day-old zebrafish larva. What look like eyes will become nostrils, and the bulges on either side will become eyes. Oscar Ruiz and George Eisenhoffer, University of Texas MD Anderson Cancer Center, Houston 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 MediaCalcium uptake during ATP production in mitochondria
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Living primary mouse embryonic fibroblasts. Mitochondria (green) stained with the mitochondrial membrane potential indicator, rhodamine 123. Nuclei (blue) are stained with DAPI. Lili Guo, Perelman School of Medicine, University of Pennsylvania View Media