Switch to Gallery View

Image and Video Gallery

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.

Mosaicism in C. elegans (Black Background)

6532

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

Ciclo circadiano de un adolescente típico

6612

Los ritmos circadianos son cambios físicos, mentales y conductuales que siguen un ciclo de 24 horas. NIGMS View Media

Painted chromosomes

2764

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

Disease-susceptible Arabidopsis leaf

2782

This is a magnified view of an Arabidopsis thaliana leaf after several days of infection with the pathogen Hyaloperonospora arabidopsidis. Jeff Dangl, University of North Carolina, Chapel Hill View Media

Fluorescence in situ hybridization (FISH) in mouse ES cells shows DNA interactions

3296

Researchers used fluorescence in situ hybridization (FISH) to confirm the presence of long range DNA-DNA interactions in mouse embryonic stem cells. Kathrin Plath, University of California, Los Angeles View Media

Arabidopsis leaf injected with a pathogen

2780

This is a magnified view of an Arabidopsis thaliana leaf eight days after being infected with the pathogen Hyaloperonospora arabidopsidis, which is closely related to crop pathogens that Jeff Dangl, University of North Carolina, Chapel Hill View Media

DNA and actin in cultured fibroblast cells

3670

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

Nucleotides make up DNA (with labels)

2542

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

Repairing DNA

3493

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

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

3609

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

A molecular interaction network in yeast 2

3732

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

Lily mitosis 12

1018

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

A multicolored fish scale 1

3782

Each of the 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

RNA strand

2554

Ribonucleic acid (RNA) has a sugar-phosphate backbone and the bases adenine (A), cytosine (C), guanine (G), and uracil (U). Crabtree + Company View Media

CRISPR illustration

3719

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

Histone deacetylases

7001

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

Cell division phases in Xenopus frog cells

3442

These images show three stages of cell division in Xenopus XL177 cells, which are derived from tadpole epithelial cells. They are (from top): metaphase, anaphase and telophase. Claire Walczak, who took them while working as a postdoc in the laboratory of Timothy Mitchison View Media

Two-headed Xenopus laevis tadpole

2755

Xenopus laevis, the African clawed frog, has long been used as a research organism for studying embryonic development. Michael Klymkowsky, University of Colorado, Boulder View Media

Epigenetic code (with labels)

2563

The "epigenetic code" controls gene activity with chemical tags that mark DNA (purple diamonds) and the "tails" of histone proteins (purple triangles). Crabtree + Company View Media

Dicty fruit

2684

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

Zinc finger

2426

The structure of a gene-regulating zinc finger protein bound to DNA. Jeremy M. Berg, National Institute of General Medical Sciences View Media

Introns (with labels)

2551

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

Lily mitosis 13

1019

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

CRISPR Illustration Frame 1

6465

This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. This is the first frame in a series of four. National Institute of General Medical Sciences. View Media

Automated Worm Sorter - 4

3475

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

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

2549

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

GFP sperm

2683

Fruit fly sperm cells glow bright green when they express the gene for green fluorescent protein (GFP). View Media

Highlighted cells

2429

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

Cross section of a Drosophila melanogaster pupa lacking Draper

2759

In the absence of the engulfment receptor Draper, salivary gland cells (light blue) persist in the thorax of a developing Drosophila melanogaster pupa. Christina McPhee and Eric Baehrecke, University of Massachusetts Medical School View Media

Alternative splicing

2552

Arranging exons in different patterns, called alternative splicing, enables cells to make different proteins from a single gene. Crabtree + Company View Media

Induced stem cells from adult skin 03

2605

The human skin cells pictured contain genetic modifications that make them pluripotent, essentially equivalent to embryonic stem cells. James Thomson, University of Wisconsin-Madison View Media

Endoplasmic reticulum abnormalities 2

6774

Human cells with the gene that codes for the protein FIT2 deleted. After an experimental intervention, they are expressing a nonfunctional version of FIT2, shown in green. Michel Becuwe, Harvard University. View Media

Introduction to Genome Editing Using CRISPR/Cas9

5815

Genome editing using CRISPR/Cas9 is a rapidly expanding field of scientific research with emerging applications in disease treatment, medical therapeutics and bioenergy, just to name a few. Janet Iwasa View Media

Genetically identical mycobacteria respond differently to antibiotic 1

5751

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

RNA interference

2558

RNA interference or RNAi is a gene-silencing process in which double-stranded RNAs trigger the destruction of specific RNAs. Crabtree + Company View Media

Fly by night

2417

This fruit fly expresses green fluorescent protein (GFP) in the same pattern as the period gene, a gene that regulates circadian rhythm and is expressed in all sensory neurons on the surface of the fl Jay Hirsh, University of Virginia View Media

Endoplasmic reticulum abnormalities

6773

Human cells with the gene that codes for the protein FIT2 deleted. Green indicates an endoplasmic reticulum (ER) resident protein. Michel Becuwe, Harvard University. View Media

Trp_RS - tryptophanyl tRNA-synthetase family of enzymes

2483

This image represents the structure of TrpRS, a novel member of the tryptophanyl tRNA-synthetase family of enzymes. View Media

Life of an AIDS virus (with labels and stages)

2515

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

From DNA to Protein

2509

Nucleotides in DNA are copied into RNA, where they are read three at a time to encode the amino acids in a protein. Many parts of a protein fold as the amino acids are strung together. Crabtree + Company View Media

Lily mitosis 02

1012

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

Bottles of warfarin

2579

In 2007, the FDA modified warfarin's label to indicate that genetic makeup may affect patient response to the drug. The widely used blood thinner is sold under the brand name Coumadin®. Alisa Machalek, NIGMS/NIH View Media

Dicer generates microRNAs

2556

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

DNA replication origin recognition complex (ORC)

3597

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

Apoptosis reversed

3486

Two healthy cells (bottom, left) enter into apoptosis (bottom, center) but spring back to life after a fatal toxin is removed (bottom, right; top). Hogan Tang of the Denise Montell Lab, Johns Hopkins University School of Medicine View Media

Pulsating response to stress in bacteria

3253

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

Fruit fly ovary

3607

A fruit fly ovary, shown here, contains as many as 20 eggs. Fruit flies are not merely tiny insects that buzz around overripe fruit—they are a venerable scientific tool. Denise Montell, Johns Hopkins University and University of California, Santa Barbara View Media

Dividing cells showing chromosomes and cell skeleton

3631

This pig cell is in the process of dividing. The chromosomes (purple) have already replicated and the duplicates are being pulled apart by fibers of the cell skeleton known as microtubules (green). Nasser Rusan, National Heart, Lung, and Blood Institute, National Institutes of Health View Media

Meiosis illustration (with labels)

2546

Meiosis is the process whereby a cell reduces its chromosomes from diploid to haploid in creating eggs or sperm. Crabtree + Company View Media

Microscopy image of bird-and-flower DNA origami

3690

An atomic force microscopy image shows DNA folded into an intricate, computer-designed structure. Hao Yan, Arizona State University View Media