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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.

Mouse retina

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What looks like the gossamer wings of a butterfly is actually the retina of a mouse, delicately snipped to lay flat and sparkling with fluorescent molecules. Tom Deerinck and Keunyoung (“Christine”) Kim, NCMIR View Media

Anti-tumor drug ecteinascidin 743 (ET-743) with hydrogens 02

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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

Hydra 04

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Hydra magnipapillata is an invertebrate animal used as a model organism to study developmental questions, for example the formation of the body axis. Hiroshi Shimizu, National Institute of Genetics in Mishima, Japan View Media

Molecules blocking Huntington's protein production

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The molecules that glow blue in these cultured cells prevent the expression of the mutant proteins that cause Huntington's disease. Jiaxin Hu, David W. Dodd and Robert H. E. Hudson, UT Southwestern Medical Center View Media

TonB protein in gram-negative bacteria

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The green in this image highlights a protein called TonB, which is produced by many gram-negative bacteria, including those that cause typhoid fever, meningitis and dysentery. Phillip Klebba, Kansas State University View Media

tRNA splicing enzyme endonuclease in humans

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An NMR solution structure model of the transfer RNA splicing enzyme endonuclease in humans (subunit Sen15). This represents the first structure of a eukaryotic tRNA splicing endonuclease subunit. Center for Eukaryotic Structural Genomics, PSI View Media

Retinal pigment epithelium derived from human ES cells 02

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This image shows a layer of retinal pigment epithelium cells derived from human embryonic stem cells, highlighting the nuclei (red) and cell surfaces (green). David Buckholz and Sherry Hikita, University of California, Santa Barbara, via CIRM View Media

Fluorescent microscopy of kidney tissue

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Serum albumin (SA) is the most abundant protein in the blood plasma of mammals. SA has a characteristic heart-shape structure and is a highly versatile protein. Tom Deerinck , National Center for Microscopy and Imaging Research View Media

Phagosome in macrophage cell

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A sensor particle being engulfed by a macrophage—an immune cell—and encapsuled in a compartment called a phagosome. The phagosome then fuses with lysosomes—another type of compartment. Yan Yu, Indiana University, Bloomington. View Media

ATP synthase

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The world's smallest motor, ATP synthase, generates energy for the cell. See image 2518 for a labeled version of this illustration. Crabtree + Company View Media

Bacteria working to eat

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Gram-negative bacteria perform molecular acrobatics just to eat. Because they're encased by two membranes, they must haul nutrients across both. Emad Tajkhorshid, University of Illinois at Urbana-Champaign View Media

Antibiotic-surviving bacteria

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Colonies of bacteria growing despite high concentrations of antibiotics. These colonies are visible both by eye, as seen on the left, and by bioluminescence imaging, as seen on the right. Paul Stoodley, The Ohio State University. View Media

Glow-in-the-dark salamanders

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These six-month-old axolotls, a kind of salamander, glow green and blue under ultraviolet light. That's because they were genetically modified to make harmless green fluorescent protein, or GFP. View Media

Staphylococcus aureus in the porous coating of a femoral hip stem

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Staphylococcus aureus bacteria (blue) on the porous coating of a femoral hip stem used in hip replacement surgery. Paul Stoodley, The Ohio State University. View Media

dUTP pyrophosphatase from M. tuberculosis

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Model of an enzyme, dUTP pyrophosphatase, from Mycobacterium tuberculosis. Drugs targeted to this enzyme might inhibit the replication of the bacterium that causes most cases of tuberculosis. Mycobacterium Tuberculosis Center, PSI View Media

G switch (with labels)

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The G switch allows our bodies to respond rapidly to hormones. G proteins act like relay batons to pass messages from circulating hormones into cells. Crabtree + Company View Media

Mouse brain 2

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A mouse brain that was genetically modified so that subpopulations of its neurons glow. Prayag Murawala, MDI Biological Laboratory and Hannover Medical School. View Media

Lysosome clusters around amyloid plaques

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It's probably most people's least favorite activity, but we still need to do it--take out our trash. Otherwise our homes will get cluttered and smelly, and eventually, we'll get sick. Swetha Gowrishankar and Shawn Ferguson, Yale School of Medicine View Media

Crystals of CCD-1 in complex with cefotaxime

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CCD-1 is an enzyme produced by the bacterium Clostridioides difficile that helps it resist antibiotics. Keith Hodgson, Stanford University. View Media

Streptococcus bacteria

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Image of Streptococcus, a type (genus) of spherical bacteria that can colonize the throat and back of the mouth. Stroptococci often occur in pairs or in chains, as shown here. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media

Movie 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 Media

Zinc levels in a plant leaf

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Zinc is required for the function of more than 300 enzymes, including those that help regulate gene expression, in various organisms including humans. Suzana Car, Dartmouth College 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

Epithelial cells

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This image mostly shows normal cultured epithelial cells expressing green fluorescent protein targeted to the Golgi apparatus (yellow-green) and stained for actin (magenta) and DNA (cyan). Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

A2A adenosine receptor

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The receptor is shown bound to an inverse agonist, ZM241385. Raymond Stevens, The Scripps Research Institute View Media

¿Qué es la sepsis? (Sepsis Infographic)

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La sepsis o septicemia es la respuesta fulminante y extrema del cuerpo a una infección. En los Estados Unidos, más de 1.7 millones de personas contraen sepsis cada año. Instituto Nacional de Ciencias Médicas Generales View Media

Mouse colon with gut bacteria

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A section of mouse colon with gut bacteria (center, in green) residing within a protective pocket. Sarkis K. Mazmanian, California Institute of Technology View Media

Bacterial 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 Media

Structure of a key antigen protein involved with Hepatitis C Virus infection

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A three-dimensional representation of the structure of E2, a key antigen protein involved with hepatitis C virus infection. Mansun Law Associate Professor Department of Immunolgy and Microbial Science The Scripps Research Institute View Media

Correlative imaging by annotation with single molecules (CIASM) process

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These images illustrate a technique combining cryo-electron tomography and super-resolution fluorescence microscopy called correlative imaging by annotation with single molecules (CIASM). Peter Dahlberg, Stanford University. View Media

Morphine Structure

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

Cell cycle (with labels)

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Cells progress through a cycle that consists of phases for growth (G1, S, and G2) and division (M). Cells become quiescent when they exit this cycle (G0). Crabtree + Company View Media

Thermotoga maritima and its metabolic network

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A combination of protein structures determined experimentally and computationally shows us the complete metabolic network of a heat-loving bacterium. View Media

Protein map

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Network diagram showing a map of protein-protein interactions in a yeast (Saccharomyces cerevisiae) cell. This cluster includes 78 percent of the proteins in the yeast proteome. Hawoong Jeong, KAIST, Korea View Media

Skin cross-section

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Cross-section of skin anatomy shows layers and different tissue types. National Institutes of Health Medical Arts View Media

Xenopus laevis embryos

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Xenopus laevis, the African clawed frog, has long been used as a model organism for studying embryonic development. The frog embryo on the left lacks the developmental factor Sizzled. Michael Klymkowsky, University of Colorado, Boulder View Media

Sea urchin embryo 04

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Stereo triplet of a sea urchin embryo stained to reveal actin filaments (orange) and microtubules (blue). George von Dassow, University of Washington View Media