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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.

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

Pulsating response to stress in bacteria - video

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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

Honeybee 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 Media

Nucleotides 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 Media

RNA Polymerase II

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NIGMS-funded researchers led by Roger Kornberg solved the structure of RNA polymerase II. David Bushnell, Ken Westover and Roger Kornberg, Stanford University View Media

Telomeres on outer edge of nucleus during cell division

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New research shows telomeres moving to the outer edge of the nucleus after cell division, suggesting these caps that protect chromosomes also may play a role in organizing DNA. Laure Crabbe, Jamie Kasuboski and James Fitzpatrick, Salk Institute for Biological Studies View Media

Lily mitosis 12

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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

Chromosomes before crossing over

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

Painted chromosomes

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Like a paint-by-numbers picture, painted probes tint individual human chromosomes by targeting specific DNA sequences. Beth A. Sullivan, Duke University View Media

DNA and actin in cultured fibroblast cells

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DNA (blue) and actin (red) in cultured fibroblast cells. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

Histone deacetylases

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The human genome contains much of the information needed for every cell in the body to function. However, different types of cells often need different types of information. Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media

Culex quinquefasciatus mosquito larva

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A mosquito larva with genes edited by CRISPR. The red-orange glow is a fluorescent protein used to track the edits. Valentino Gantz, University of California, San Diego. View Media

RSV-Infected Cell

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Viral RNA (red) in an RSV-infected cell. Eric Alonas and Philip Santangelo, Georgia Institute of Technology and Emory University View Media

A dynamic model of the DNA helicase protein complex

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This short video shows a model of the DNA helicase in yeast. This DNA helicase has 11 proteins that work together to unwind DNA during the process of copying it, called DNA replication. Huilin Li, Stony Brook University View Media

Lily mitosis 06

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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

Genetically identical mycobacteria respond differently to antibiotic 1

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Antibiotic resistance in microbes is a serious health concern. So researchers have turned their attention to how bacteria undo the action of some antibiotics. Bree Aldridge, Tufts University View Media

Meiosis 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 Media

Developing 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 Media

Sponge

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Many of today's medicines come from products found in nature, such as this sponge found off the coast of Palau in the Pacific Ocean. Phil Baran, Scripps Research Institute View Media

Trypanosoma brucei, the cause of sleeping sickness

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Trypanosoma brucei is a single-cell parasite that causes sleeping sickness in humans. Michael Rout, Rockefeller University View Media

Nucleolus subcompartments spontaneously self-assemble 4

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What looks a little like distant planets with some mysterious surface features are actually assemblies of proteins normally found in the cell's nucleolus, a small but very important protein complex lo Nilesh Vaidya, Princeton University View Media

A molecular interaction network in yeast 2

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

Chromosome inside nucleus (with labels)

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The long, stringy DNA that makes up genes is spooled within chromosomes inside the nucleus of a cell. Crabtree + Company 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

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

Zebrafish 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 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

Histones in chromatin (with labels)

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Histone proteins loop together with double-stranded DNA to form a structure that resembles beads on a string. Crabtree + Company View Media

Mature, flowering Arabidopsis

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This is an adult flowering Arabidopsis thaliana plant with the inbred designation L-er. Arabidopsis is the most widely used model organism for researchers who study plant genetics. Jeff Dangl, University of North Carolina, Chapel Hill View Media

DNA replication illustration (with labels)

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During DNA replication, each strand of the original molecule acts as a template for the synthesis of a new, complementary DNA strand. Crabtree + Company 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

Central dogma, illustrated (with labels and numbers for stages)

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DNA encodes RNA, which encodes protein. DNA is transcribed to make messenger RNA (mRNA). The mRNA sequence (dark red strand) is complementary to the DNA sequence (blue strand). Crabtree + Company View Media

Circadian rhythms and the SCN

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Circadian rhythms are physical, mental, and behavioral changes that follow a 24-hour cycle. NIGMS View Media

Highlighted cells

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The cytoskeleton (green) and DNA (purple) are highlighed in these cells by immunofluorescence. Torsten Wittmann, Scripps Research Institute View Media

Meiosis illustration

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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 Media

Snowflake DNA origami

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An atomic force microscopy image shows DNA folded into an intricate, computer-designed structure. The image is featured on Biomedical Beat blog post Cool Images: A Holiday-Themed Collection. Hao Yan, Arizona State University View Media

DNA replication origin recognition complex (ORC)

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A study published in March 2012 used cryo-electron microscopy to determine the structure of the DNA replication origin recognition complex (ORC), a semi-circular, protein complex (yellow) that recogni Huilin Li, Brookhaven National Laboratory View Media

Nucleolus subcompartments spontaneously self-assemble 3

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What looks a little like distant planets with some mysterious surface features are actually assemblies of proteins normally found in the cell's nucleolus, a small but very important protein complex lo Nilesh Vaidya, Princeton University View Media

Dolly the sheep

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Scientists in Scotland were the first to clone an animal, this sheep named Dolly. She later gave birth to Bonnie, the lamb next to her. View Media

RNA interference (with labels)

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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 Media

Automated Worm Sorter - 4

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Georgia Tech associate professor Hang Lu holds a microfluidic chip that is part of a system that uses artificial intelligence and cutting-edge image processing to automatically examine large number of Georgia Tech/Gary Meek View Media

Protein formation

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Proteins are 3D structures made up of smaller units. DNA is transcribed to RNA, which in turn is translated into amino acids. NIGMS, with the folded protein illustration adapted from Jane Richardson, Duke University Medical Center View Media

Haplotypes

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Haplotypes are combinations of gene variants that are likely to be inherited together within the same chromosomal region. Crabtree + Company View Media

A molecular interaction network in yeast 1

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

Recombinant DNA (with labels)

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To splice a human gene (in this case, the one for insulin) into a plasmid, scientists take the plasmid out of an E. Crabtree + Company View Media

Average teen circadian cycle

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Circadian rhythms are physical, mental, and behavioral changes that follow a 24-hour cycle. Typical circadian rhythms lead to high energy during the middle of the day (10 a.m. NIGMS View Media

Lily mitosis 01

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A light microscope image shows the chromosomes, stained dark blue, in a dividing cell of an African globe lily (Scadoxus katherinae). Andrew S. Bajer, University of Oregon, Eugene View Media

Central dogma, illustrated (with labels)

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DNA encodes RNA, which encodes protein. DNA is transcribed to make messenger RNA (mRNA). The mRNA sequence (dark red strand) is complementary to the DNA sequence (blue strand). Crabtree + Company View Media

Histones in chromatin

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Histone proteins loop together with double-stranded DNA to form a structure that resembles beads on a string. Crabtree + Company View Media

Lily mitosis 07

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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