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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.

Bond types (with labels)

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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

Glowing fish

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Professor Marc Zimmer's family pets, including these fish, glow in the dark in response to blue light. Featured in the September 2009 issue of Findings. View Media

Golgi

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The Golgi complex, also called the Golgi apparatus or, simply, the Golgi. Judith Stoffer View Media

Diversity oriented synthesis: generating skeletal diversity using folding processes

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This 1 1/2-minute video animation was produced for chemical biologist Stuart Schreiber's lab page. The animation shows how diverse chemical structures can be produced in the lab. Eric Keller View Media

CRISPR Illustration Frame 2

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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 Media

Pig trypsin (2)

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A crystal 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

Serum albumin structure 3

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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. Wladek Minor, University of Virginia View Media

Dividing yeast cells with nuclear envelopes and spindle pole bodies

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Time-lapse video of yeast cells undergoing cell division. Nuclear envelopes are shown in green, and spindle pole bodies, which help pull apart copied genetic information, are shown in magenta. Alaina Willet, Kathy Gould’s lab, Vanderbilt University. 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

Protein from Methanobacterium thermoautotrophicam

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A knotted protein from an archaebacterium called Methanobacterium thermoautotrophicam. This organism breaks down waste products and produces methane gas. Midwest Center For Structural Genomics, PSI View Media

Bacterial cells aggregating above the light organ of the Hawaiian bobtail squid

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A light organ (~0.5 mm across) of a juvenile Hawaiian bobtail squid, Euprymna scolopes. Margaret J. McFall-Ngai, Carnegie Institution for Science/California Institute of Technology, and Edward G. Ruby, California Institute of Technology. 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

Pig trypsin crystal

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

A mammalian eye has approximately 70 different cell types

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The incredible complexity of a mammalian eye (in this case from a mouse) is captured here. Each color represents a different type of cell. Bryan William Jones and Robert E. Marc, University of Utah View Media

Mouse Retina

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A genetic disorder of the nervous system, neurofibromatosis causes tumors to form on nerves throughout the body, including a type of tumor called an optic nerve glioma that can result in childhood bli Tom Deerinck, NCMIR View Media

Mouse Brain Cross Section

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The brain sections are treated with fluorescent antibodies specific to a particular protein and visualized using serial electron microscopy (SEM). Anton Maximov, The Scripps Research Institute, La Jolla, CA View Media

Calcium 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

Human liver cell (hepatocyte)

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Hepatocytes, like the one shown here, are the most abundant type of cell in the human liver. Donna Beer Stolz, University of Pittsburgh View Media

2-D NMR

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A two-dimensional NMR spectrum of a protein, in this case a 2D 1H-15N HSQC NMR spectrum of a 228 amino acid DNA/RNA-binding protein. Dr. Xiaolian Gao's laboratory at the University of Houston View Media

Master clock of the mouse brain

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An image of the area of the mouse brain that serves as the 'master clock,' which houses the brain's time-keeping neurons. The nuclei of the clock cells are shown in blue. Erik Herzog, Washington University in St. Louis 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

Math from the heart

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Watch a cell ripple toward a beam of light that turns on a movement-related protein. View Media

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

Nucleolus subcompartments spontaneously self-assemble 2

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The nucleolus is a small but very important protein complex located in the cell's nucleus. Nilesh Vaidya, Princeton University View Media

PanC from M. tuberculosis

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Model of an enzyme, PanC, that is involved in the last step of vitamin B5 biosynthesis in Mycobacterium tuberculosis. PanC is essential for the growth of M. Mycobacterium Tuberculosis Center, PSI View Media

Pigment cells in fish skin

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Pigment cells are cells that give skin its color. David Parichy, University of Washington View Media

Molecular interactions at the astrocyte nuclear membrane

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These ripples of color represent the outer membrane of the nucleus inside an astrocyte, a star-shaped cell inside the brain. Katerina Akassoglou, Gladstone Institute for Neurological Disease & UCSF View Media

Mitosis - anaphase

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A cell in anaphase during mitosis: Chromosomes separate into two genetically identical groups and move to opposite ends of the spindle. Judith Stoffer View Media

Life of an AIDS virus (with labels)

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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

Finding one bug

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A nanometer-sized biosensor can detect a single deadly bacterium in tainted ground beef. How? Weihong Tan, University of Florida in Gainesville View Media

Regeneration of Mouse Ears

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Normal mice, like the B6 breed pictured on the left, develop scars when their ears are pierced. Ellen Heber-Katz, The Wistar Institute 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

Bacterial nanowire model

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A model of a Geobacter sulfurreducens nanowire created from cryo-electron microscopy images. Edward Egelman, University of Virginia. 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

Early ribbon drawing of a protein

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This ribbon drawing of a protein hand drawn and colored by researcher Jane Richardson in 1981 helped originate the ribbon representation of proteins that is now ubiquitous in molecular graphics. Jane Richardson, Duke University Medical Center View Media

Sea urchin embryo 01

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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

Translation

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Ribosomes manufacture proteins based on mRNA instructions. Each ribosome reads mRNA, recruits tRNA molecules to fetch amino acids, and assembles the amino acids in the proper order. Judith Stoffer View Media

Sea urchin embryo 02

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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

Cell eyes clock

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Cells keep time to know when to retire. Judith Stoffer View Media

Protein purification robot

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Irina Dementieva, a biochemist, and Youngchang Kim, a biophysicist and crystallographer, work with the first robot of its type in the U.S. to automate protein purification. Midwest Center for Structural Genomics View Media

Atomic Structure of Poppy Enzyme

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The atomic structure of the morphine biosynthetic enzyme salutaridine reductase bound to the cofactor NADPH. The substrate salutaridine is shown entering the active site. Judy Coyle, Donald Danforth Plant Science Center 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

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

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

G switch (with labels and stages)

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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

Red Poppy

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A red poppy. Judy Coyle, Donald Danforth Plant Science Center 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

Microsporidia in roundworm 1

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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

Animal cell membrane

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The membrane that surrounds a cell is made up of proteins and lipids. Judith Stoffer View Media

Dicer generates microRNAs (with labels)

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The enzyme Dicer generates microRNAs by chopping larger RNA molecules into tiny Velcro®-like pieces. MicroRNAs stick to mRNA molecules and prevent the mRNAs from being made into proteins. Crabtree + Company View Media