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This is a searchable collection of scientific photos, illustrations, and videos. The images and videos in this gallery are licensed under Creative Commons Attribution Non-Commercial ShareAlike 3.0. This license lets you remix, tweak, and build upon this work non-commercially, as long as you credit and license your new creations under identical terms.

Blinking bacteria

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Like a pulsing blue shower, E. coli cells flash in synchrony. Genes inserted into each cell turn a fluorescent protein on and off at regular intervals. Jeff Hasty, University of California, San Diego View Media

Fungal lipase (2)

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Crystals of fungal lipase protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine 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

Ribonuclease P structure

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Ribbon diagram showing the structure of Ribonuclease P with tRNA. PDB entry 3Q1Q, molecular modeling by Fred Friedman, NIGMS View Media

NCMIR Kidney Glomeruli

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Stained glomeruli in the kidney. The kidney is an essential organ responsible for disposing wastes from the body and for maintaining healthy ion levels in the blood. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

Fruit fly retina 02

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Section of a fruit fly retina showing the light-sensing molecules rhodopsin-5 (blue) and rhodopsin-6 (red). Hermann Steller, Rockefeller University View Media

Mapping metabolic activity

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Like a map showing heavily traveled roads, this mathematical model of metabolic activity inside an E. coli cell shows the busiest pathway in white. Albert-László Barabási, University of Notre Dame View Media

Tracking embryonic zebrafish cells

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To better understand cell movements in developing embryos, researchers isolated cells from early zebrafish embryos and grew them as clusters. Liliana Solnica-Krezel, Washington University School of Medicine in St. Louis. View Media

3D reconstruction of a tubular matrix in peripheral endoplasmic reticulum

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Detailed three-dimensional reconstruction of a tubular matrix in a thin section of the peripheral endoplasmic reticulum between the plasma membranes of the cell. Jennifer Lippincott-Schwartz, Howard Hughes Medical Institute Janelia Research Campus, Virginia View Media

Movements of myosin

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Inside the fertilized egg cell of a fruit fly, we see a type of myosin (related to the protein that helps muscles contract) made to glow by attaching a fluorescent protein. Victoria Foe, University of Washington View Media

Group of fluorescent C. elegans showing muscle and ribosomal protein

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Three C. elegans, tiny roundworms, with a ribosomal protein glowing red and muscle fibers glowing green. Researchers used these worms to study a molecular pathway that affects aging. Jarod Rollins, Mount Desert Island Biological Laboratory. View Media

Morphine Structure

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The chemical structure of the morphine molecule Judy Coyle, Donald Danforth Plant Science Center View Media

Q fever bacteria in an infected cell

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This image shows Q fever bacteria (yellow), which infect cows, sheep, and goats around the world and can infect humans, as well. When caught early, Q fever can be cured with antibiotics. Robert Heinzen, Elizabeth Fischer, and Anita Mora, National Institute of Allergy and Infectious Diseases, National Institutes of Health View Media

O2 reacting with a flavin-dependent enzyme

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Department of Biological Chemistry, University of Michigan View Media

Pollen grains: male germ cells in plants and a cause of seasonal allergies

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Those of us who get sneezy and itchy-eyed every spring or fall may have pollen grains, like those shown here, to blame. Edna, Gil, and Amit Cukierman, Fox Chase Cancer Center, Philadelphia, Pa. View Media

Aspirin (with labels)

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Acetylsalicylate (bottom) is the aspirin of today. Crabtree + Company View Media

NMR spectrometer

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This photo shows a Varian Unity Inova 900 MHz, 21.1 T standard bore magnet Nuclear Magnetic Resonnance (NMR) spectrometer. Center for Eukaryotic Structural Genomics View Media

Dicty fruit

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Dictyostelium discoideum is a microscopic amoeba. A group of 100,000 form a mound as big as a grain of sand. Featured in The New Genetics. View Media

Housekeeping cell illustration

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Cell mopping up. Judith Stoffer View Media

Beta2-adrenergic receptor protein

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Crystal structure of the beta2-adrenergic receptor protein. The Stevens Laboratory, The Scripps Research Institute View Media

Bacterial ribosome assembly

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3D reconstructions of two stages in the assembly of the bacterial ribosome created from time-resolved cryo-electron microscopy images. Ribosomes translate genetic instructions into proteins. Joachim Frank, Columbia University. View Media

Bond types

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Ionic and covalent bonds hold molecules, like sodium chloride and chlorine gas, together. Hydrogen bonds among molecules, notably involving water, also play an important role in biology. Crabtree + Company View Media

Anti-tumor drug ecteinascidin 743 (ET-743), structure without hydrogens 03

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Ecteinascidin 743 (ET-743, brand name Yondelis), was discovered and isolated from a sea squirt, Ecteinascidia turbinata, by NIGMS grantee Kenneth Rinehart at the University of Illinois. Timothy Jamison, Massachusetts Institute of Technology View Media

HIV-1 virus in the colon

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A tomographic reconstruction of the colon shows the location of large pools of HIV-1 virus particles (in blue) located in the spaces between adjacent cells. Mark Ladinsky, California Institute of Technology View Media

Microtubules in hippocampal neurons

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Microtubules (magenta) in neurons of the hippocampus, a part of the brain involved in learning and memory. Microtubules are strong, hollow fibers that provide structural support to cells. Melike Lakadamyali, Perelman School of Medicine at the University of Pennsylvania. View Media

NCMIR mouse tail

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Stained cross section of a mouse tail. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

Protective membrane and membrane proteins of the dengue virus visualized with cryo-EM

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Dengue virus is a mosquito-borne illness that infects millions of people in the tropics and subtropics each year. Like many viruses, dengue is enclosed by a protective membrane. Hong Zhou, UCLA View Media

Microsporidia in roundworm 3

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Many disease-causing microbes manipulate their host’s metabolism and cells for their own ends. Keir Balla and Emily Troemel, University of California San Diego View Media

Protein from E. faecalis

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X-ray structure of a DNA repair enzyme superfamily representative from the human gastrointestinal bacterium Enterococcus faecalis. Midwest Center for Structural Genomics View Media

Nicotinic acid phosphoribosyltransferase

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Model of the enzyme nicotinic acid phosphoribosyltransferase. Berkeley Structural Genomics Center, PSI View Media

Life of an AIDS virus

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HIV is a retrovirus, a type of virus that carries its genetic material not as DNA but as RNA. Crabtree + Company View Media

Hsp33 Heat Shock Protein Inactive to Active

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When the heat shock protein hsp33 is folded, it is inactive and contains a zinc ion, stabilizing the redox sensitive domain (orange). Dana Reichmann, University of Michigan View Media

Life of an AIDS virus (with labels and stages)

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HIV is a retrovirus, a type of virus that carries its genetic material not as DNA but as RNA. Crabtree + Company View Media

A molecular interaction network in yeast 3

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The image visualizes a part of the yeast molecular interaction network. Keiichiro Ono, UCSD View Media

Symmetrically and asymmetrically elongating cells

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Merged fluorescent images of symmetrically (left) or asymmetrically (right) elongating HeLa cells at the end of early anaphase (magenta) and late anaphase (green). Tomomi Kiyomitsu and Iain M. Cheeseman, Whitehead Institute for Biomedical Research View Media

Oligoendopeptidase F from B. stearothermophilus

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Crystal structure of oligoendopeptidase F, a protein slicing enzyme from Bacillus stearothermophilus, a bacterium that can cause food products to spoil. Accelerated Technologies Center for Gene to 3D Structure/Midwest Center for Structural Genomics View Media

VDAC video 03

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This video shows the structure of the pore-forming protein VDAC-1 from humans. Gerhard Wagner, Harvard Medical School View Media

Optic nerve astrocytes

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Astrocytes in the cross section of a human optic nerve head Tom Deerinck and Keunyoung (“Christine”) Kim, NCMIR 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

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

X-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 Media

Gene silencing

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Pretty in pink, the enzyme histone deacetylase (HDA6) stands out against a background of blue-tinted DNA in the nucleus of an Arabidopsis plant cell. Olga Pontes and Craig Pikaard, Washington University View Media

Borrelia 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 Media

Focal adhesions

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Cells walk along body surfaces via tiny "feet," called focal adhesions, that connect with the extracellular matrix. Crabtree + Company View Media

Crane fly spermatocyte undergoing meiosis

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A crane fly spermatocyte during metaphase of meiosis-I, a step in the production of sperm. Michael Shribak, Marine Biological Laboratory/University of Chicago. View Media

Electrostatic map of the adeno-associated virus

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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 Media

How cilia do the wave

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Thin, hair-like biological structures called cilia are tiny but mighty. Zvonimir Dogic, Brandeis University 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

Smooth ER

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The endoplasmic reticulum comes in two types: Rough ER is covered with ribosomes and prepares newly made proteins; smooth ER specializes in making lipids and breaking down toxic molecules. Judith Stoffer View Media

Lily mitosis 03

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A light microscope image of a cell from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media