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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.

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

Vibrio bacteria

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Vibrio, a type (genus) of rod-shaped bacteria. Some Vibrio species cause cholera in humans. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media

Two mouse fibroblast cells

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Two mouse fibroblasts, one of the most common types of cells in mammalian connective tissue. They play a key role in wound healing and tissue repair. Dylan T. Burnette, Vanderbilt University School of Medicine. View Media

Mouse cerebellum

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The cerebellum is the brain's locomotion control center. Found at the base of your brain, the cerebellum is a single layer of tissue with deep folds like an accordion. National Center for Microscopy and Imaging Research (NCMIR) View Media

VDAC-1 (2)

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

Salivary gland in the developing fruit fly

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For fruit flies, the salivary gland is used to secrete materials for making the pupal case, the protective enclosure in which a larva transforms into an adult fly. Richard Fehon, University of Chicago View Media

Tex protein

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Model of a member from the Tex protein family, which is implicated in transcriptional regulation and highly conserved in eukaryotes and prokaryotes. New York Structural GenomiX Research Consortium, PSI View Media

Snowflake 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 Media

Molecular model of freshly made Rous sarcoma virus (RSV)

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Viruses have been the foes of animals and other organisms for time immemorial. Boon Chong Goh, University of Illinois at Urbana-Champaign View Media

Protein clumping in zinc-deficient yeast cells

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The green spots in this image are clumps of protein inside yeast cells that are deficient in both zinc and a protein called Tsa1 that prevents clumping. Colin MacDiarmid and David Eide, University of Wisconsin--Madison View Media

Carbon 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 Media

Research mentor and student

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A research mentor (Lori Eidson) and student (Nina Waldron, on the microscope) were 2009 members of the BRAIN (Behavioral Research Advancements In Neuroscience) program at Georgia State University in A Elizabeth Weaver, Georgia State University 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

Phenylalanine tRNA molecule

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Phenylalanine tRNA showing the anticodon (yellow) and the amino acid, phenylalanine (blue and red spheres). Patrick O'Donoghue and Dieter Soll, Yale University View Media

Fruit fly spermatids

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Developing spermatids (precursors of mature sperm cells) begin as small, round cells and mature into long-tailed, tadpole-shaped ones. Lacramioara Fabian, The Hospital for Sick Children, Toronto, Canada View Media

Network 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 Media

Seeing signaling protein activation in cells 02

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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

Catalase diversity

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Catalases are some of the most efficient enzymes found in cells. Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media

Dividing cell

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As this cell was undergoing cell division, it was imaged with two microscopy techniques: differential interference contrast (DIC) and confocal. The DIC view appears in blue and shows the entire cell. Dylan T. Burnette, Vanderbilt University School of Medicine. 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

Lily mitosis 13

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A light microscope image of cells 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

Mitosis - prometaphase

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A cell in prometaphase during mitosis: The nuclear membrane breaks apart, and the spindle starts to interact with the chromosomes. Judith Stoffer View Media

Proteasome

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This fruit fly spermatid recycles various molecules, including malformed or damaged proteins. Sigi Benjamin-Hong, Rockefeller University View Media

Adult and juvenile Hawaiian bobtail squids

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An adult Hawaiian bobtail squid, Euprymna scolopes, (~4 cm) surrounded by newly hatched juveniles (~2 mm) in a bowl of seawater.
Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. View Media

A multicolored fish scale 2

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Each of the tiny colored specs in this image is a cell on the surface of a fish scale. Chen-Hui Chen and Kenneth Poss, Duke University View Media

Chromosomes before crossing over

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Duplicated pair of chromosomes lined up and ready to cross over. Judith Stoffer View Media

Cell division with late aligning chromosomes

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This video shows an instance of abnormal mitosis where chromosomes are late to align. Gary Gorbsky, Oklahoma Medical Research Foundation View Media

Anglerfish ovary cross-section

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This image captures the spiral-shaped ovary of an anglerfish in cross-section. Once matured, these eggs will be released in a gelatinous, floating mass. James E. Hayden, The Wistar Institute, Philadelphia, Pa. View Media

Repairing DNA

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Like a watch wrapped around a wrist, a special enzyme encircles the double helix to repair a broken strand of DNA. Tom Ellenberger, Washington University School of Medicine View Media

Young squids

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Real-time movie of young squids. Michael Shribak, Marine Biological Laboratory/University of Chicago. 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

Cell proliferation in a quail embryo

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Image showing that the edge zone (top of image) of the quail embryo shows no proliferating cells (cyan), unlike the interior zone (bottom of image). Non-proliferating cell nuclei are labeled green. Andrés Garcia, Georgia Tech View Media

Sortase b from B. anthracis

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Structure of sortase b from the bacterium B. anthracis, which causes anthrax. Sortase b is an enzyme used to rob red blood cells of iron, which the bacteria need to survive. Midwest Center for Structural Genomics, PSI View Media

Fruit fly egg ooplasmic streaming

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Two fruit fly (Drosophila melanogaster) egg cells, one on each side of the central black line. Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Hawaiian bobtail squid

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An adult Hawaiian bobtail squid, Euprymna scolopes, swimming next to a submerged hand. Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. 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

Crawling cell

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A crawling cell with DNA shown in blue and actin filaments, which are a major component of the cytoskeleton, visible in pink. Actin filaments help enable cells to crawl. Dylan T. Burnette, Vanderbilt University School of Medicine. View Media

ARTS triggers apoptosis

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Cell showing overproduction of the ARTS protein (red). ARTS triggers apoptosis, as shown by the activation of caspase-3 (green) a key tool in the cell's destruction. The nucleus is shown in blue. Hermann Steller, Rockefeller University View Media

Pulsating response to stress in bacteria

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By attaching fluorescent proteins to the genetic circuit responsible for B. subtilis's stress response, researchers can observe the cells' pulses as green flashes. Michael Elowitz, Caltech University View Media

Introns

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Genes are often interrupted by stretches of DNA (introns, blue) that do not contain instructions for making a protein. Crabtree + Company View Media

Virtual snow world

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Glide across an icy canyon, where you see smiling snowmen and waddling penguins. Toss a snowball, hear it smash against an igloo, and then watch it explode in bright colors. David Patterson and Hunter Hoffmann, University of Washington 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

Network 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 Media

Rabbit GPDA

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A crystal of rabbit GPDA protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View Media

Dynein moving along microtubules

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Dynein (green) is a motor protein that “walks” along microtubules (red, part of the cytoskeleton) and carries its cargo along with it. This video was captured through fluorescence microscopy. Morgan DeSantis, University of Michigan. View Media

Microfluidic chip

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Microfluidic chips have many uses in biology labs. Jeff Hasty Lab, UC San Diego 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

Carbon building blocks (with examples)

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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 Media

Serratezomine A

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A 3-D model of the alkaloid serratezomine A shows the molecule's complex ring structure. View Media

Cancer 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 Media