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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.

Enzymes convert subtrates into products (with labels)

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Enzymes convert substrates into products very quickly. See image 2521 for an unlabeled version of this illustration. Featured in The Chemistry of Health. Crabtree + Company View Media

Bacteriophage P22 capsid

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Cryo-electron microscopy (cryo-EM) has the power to capture details of proteins and other small biological structures at the molecular level.  This image shows proteins in the capsid, or outer co Dr. Wah Chiu, Baylor College of Medicine View Media

Oligoendopeptidase F from B. stearothermophilus

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Crystal structure of oligoendopeptidase F, a protein slicing enzyme from Bacillus stearothermophilus, a bacterium that can cause food products to spoil. Accelerated Technologies Center for Gene to 3D Structure/Midwest Center for Structural Genomics 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

Beta-galactosidase montage showing cryo-EM improvement--transparent background

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Composite image of beta-galactosidase showing how cryo-EM’s resolution has improved dramatically in recent years. Older images to the left, more recent to the right. Veronica Falconieri, Sriram Subramaniam Lab, National Cancer Institute View Media

Fly by night

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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

Transient receptor potential channel TRPV5

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A 3D reconstruction of a transient receptor potential channel called TRPV5 that was created based on cryo-electron microscopy images. Vera Moiseenkova-Bell, University of Pennsylvania. 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

Protein kinases as cancer chemotherapy targets

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Protein kinases—enzymes that add phosphate groups to molecules—are cancer chemotherapy targets because they play significant roles in almost all aspects of cell function, are tightly regulated, and co Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media

Plant resistosome

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The research organism Arabidopsis thaliana forms a large molecular machine called a resistosome to fight off infections. Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media

Weblike sheath covering developing egg chambers in a giant grasshopper

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The lubber grasshopper, found throughout the southern United States, is frequently used in biology classes to teach students about the respiratory system of insects. Kevin Edwards, Johny Shajahan, and Doug Whitman, Illinois State University. View Media

Disease-susceptible Arabidopsis leaf

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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

Hsp33 figure 1

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Featured in the March 15, 2012 issue of Biomedical Beat. Related to Hsp33 Figure 2, image 3355. Ursula Jakob and Dana Reichmann, University of Michigan View Media

Antitoxin GhoS (Illustration 2)

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Structure of the bacterial antitoxin protein GhoS. GhoS inhibits the production of a bacterial toxin, GhoT, which can contribute to antibiotic resistance. Rebecca Page and Wolfgang Peti, Brown University and Thomas K. Wood, Pennsylvania State University View Media

Cas4 nuclease protein structure

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This wreath represents the molecular structure of a protein, Cas4, which is part of a system, known as CRISPR, that bacteria use to protect themselves against viral invaders. Fred Dyda, NIDDK View Media

Mouse embryo showing Smad4 protein

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This eerily glowing blob isn't an alien or a creature from the deep sea--it's a mouse embryo just eight and a half days old. The green shell and core show a protein called Smad4. Kenneth Zaret, Fox Chase Cancer 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

Measles virus

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A cross section of the measles virus in which six proteins work together to infect cells. The measles virus is extremely infectious; 9 out of 10 people exposed will contract the disease. Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media