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.

Genetically identical mycobacteria respond differently to antibiotic 2

5752

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

Lily mitosis 01

1058

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

Brain showing hallmarks of Alzheimer's disease

3604

Along with blood vessels (red) and nerve cells (green), this mouse brain shows abnormal protein clumps known as plaques (blue). Alvin Gogineni, Genentech View Media

Trypanosoma brucei, the cause of sleeping sickness

3765

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

RNA interference (with labels)

2559

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

Dicer generates microRNAs (with labels)

2557

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

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

Protein formation

6603

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

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

Xenopus laevis embryos

2756

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

Dynamic cryo-EM model of the human transcription preinitiation complex

5730

Gene transcription is a process by which information encoded in DNA is transcribed into RNA. Eva Nogales, Berkeley Lab View Media

Induced stem cells from adult skin 01

2603

These cells are induced stem cells made from human adult skin cells that were genetically reprogrammed to mimic embryonic stem cells. James Thomson, University of Wisconsin-Madison View Media

Fruit fly ovaries

6807

Fruit fly (Drosophila melanogaster) ovaries with DNA shown in magenta and actin filaments shown in light blue. This image was captured using a confocal laser scanning microscope.
Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Pulsating response to stress in bacteria - video

3254

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

Genetic mosaicism in fruit flies

6983

Fat tissue from the abdomen of a genetically mosaic adult fruit fly. Genetic mosaicism means that the fly has cells with different genotypes even though it formed from a single zygote. Akhila Rajan, Fred Hutchinson Cancer Center View Media

A dynamic model of the DNA helicase protein complex

3750

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 08

1021

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

Circadian rhythm (with labels)

2569

The human body keeps time with a master clock called the suprachiasmatic nucleus or SCN. Crabtree + Company View Media

Central dogma, illustrated (with labels)

2548

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

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

Lily mitosis 10

1010

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

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

Central dogma, illustrated

2547

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

From DNA to Protein (labeled)

2510

The genetic code in DNA is transcribed into RNA, which is translated into proteins with specific sequences. Crabtree + Company View Media

Retroviruses as fossils

2709

DNA doesn't leave a fossil record in stone, the way bones do. Instead, the DNA code itself holds the best evidence for organisms' genetic history. Emily Harrington, science illustrator View Media

Nucleolus subcompartments spontaneously self-assemble 1

3789

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

Disease-resistant Arabidopsis leaf

2781

This is a magnified view of an Arabidopsis thaliana leaf a few days after being exposed to the pathogen Hyaloperonospora arabidopsidis. Jeff Dangl, University of North Carolina, Chapel Hill 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

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

EM of yeast cell division

5770

Cell division is an incredibly coordinated process. Matthew West and Greg Odorizzi, University of Colorado 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

Assembly of the HIV capsid

5729

The HIV capsid is a pear-shaped structure that is made of proteins the virus needs to mature and become infective. John Grime and Gregory Voth, The University of Chicago 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

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

Recombinant DNA (with labels)

2565

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

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

Nucleotides make up DNA

2541

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

CRISPR Illustration Frame 5

6489

This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. This is the fifthframe in a series of five. View Media

Early development in Arabidopsis

2733

Early on, this Arabidopsis plant embryo picks sides: While one end will form the shoot, the other will take root underground. Zachery R. Smith, Jeff Long lab at the Salk Institute for Biological Studies View Media

Meiosis illustration

2545

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

Lily mitosis 11

1011

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

Precise development in the fruit fly embryo

2593

This 2-hour-old fly embryo already has a blueprint for its formation, and the process for following it is so precise that the difference of just a few key molecules can change the plans. Thomas Gregor, Princeton University View Media

Lily mitosis 03

1013

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

Mitotic cell awaits chromosome alignment

5765

During mitosis, spindle microtubules (red) attach to chromosome pairs (blue), directing them to the spindle equator. View Media

GFP sperm

2683

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

Dividing cell in metaphase

3445

This image of a mammalian epithelial cell, captured in metaphase, was the winning image in the high- and super-resolution microscopy category of the 2012 GE Healthcare Life Sciences Cell Imaging Compe Jane Stout in the laboratory of Claire Walczak, Indiana University, GE Healthcare 2012 Cell Imaging Competition 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

Glowing bacteria make a pretty postcard

3492

This tropical scene, reminiscent of a postcard from Key West, is actually a petri dish containing an artistic arrangement of genetically engineered bacteria. Nathan C. Shaner, The Scintillon Institute View Media

Nucleolus subcompartments spontaneously self-assemble 2

3791

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