Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
A ribbons model of Human Growth Hormone, also known as Somatotropin, with a translucent surface model.
3D cartoon and Gaussian surface models. PDB 3kqg, chain id color scheme, white background.
Gamma secretase protein complex. Multi-subunit intramembrane protease that plays role in processing of proteins. 3D illustration.
The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.
The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.
Background created by fractal geometry.
ATP Synthase Protein - 3d rendered image. Medical microbiology concept.  Structure and conformational states of the bovine mitochondrial ATP (Adenosine triphosphate) synthase. Chemical energy is synthesized in eukaryotic cells primarily. Hydrolase. Hologram view. HUD, FUI
Neurotoxin concept Neurotoxin of type A of bacterium Clostridium botulinum which causes food intoxication botulism, molecular model 3d rendering
Aztreonam (left, orange) inhibits the beta-lactamase from Acinetobacter species. Avibactam (red) inhibits the beta-lactamase (blue) of Clostridioides difficile.
Different germs in the human intestines called microbiome,Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria
3D cartoon model, chain id color scheme, based on PDB 5toa, white background.
Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.
A ball and stick + ribbons model of beta-secretase - a protein that is important in forming healthy peripheral nerve cells, but is also involved in the onset of Alzheimer's disease.
Frataxin (human) mitochondrial protein. Reduced expression causes Friedreich's ataxia. 3D illustration. Cartoon & wireframe representation.
Alpha-tubulin 3C, a protein associated with the genetic diseases Clouston hidrotic ectodermal dysplasia and Kabuki syndrome. 3d rendering.
Endosomes - 3d rendered image of Endosomes are membrane-bound organelles. They are parts of endocytic membrane transport pathway.  Endomembrane system in cells. Bilayer Lipid Membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.
3D model of a protein molecule. The spatial oriented structure of the macromolecule.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Freshness capsule
Avibactam is a diazobicyclooctane inhibitor of gram-negative and gram-positive bacteria.  Avibactam (red) inhibits the bacterial enzyme beta-lactamase (blue) of Clostridioides difficile.
A ball-and-stick plus ribbons molecular model of the hormone Orexin, also known as Hypocretin.  Orexin is involved in the regulation of the sleep/wake cycle and it stimulates apetite, wakefulness and energy expenditure. It has been linked with Alzheimer's disease.  Isolated on white.
Glucose-6-phosphate dehydrogenase (G6PD) protein. Enzyme of the pentose phosphate pathway that generates co-enzyme NADPH. 3D illustration.
Background created by fractal geometry.
Abstract Pink And Green Knot
Immunoglobulin G (IgG) - 3d rendered image. Microbiology illustration  the structure of an antibody. The Y-shaped structure. IgG is the most common type of antibody.
The androgen receptor (AR), also known as NR3C4 (nuclear receptor subfamily 3, group C, member 4), is a type of nuclear receptor that is activated by binding any of the androgenic hormones, including testosterone and dihydrotestosterone in the cytoplasm and then translocating into the nucleus. 3D cartoon model with the differently colored elements of the secondary structure, white background.
Concept of Communication through Artificial Intelligence technology
C-reactive protein (CRP), an annular (ring-shaped), protein found in blood plasma. It is thought to assist in complement binding to foreign and damaged cells and enhances phagocytosis by macrophages
graphs and cells
Free Images: "bestof:PDB 2pip EBI.png All alpha proteins Nuclear receptor ligand-binding domain Nuclear receptor ligand-binding domain Nuclear receptor ligand-binding domain"
Submarines subs nuclear ships navy.jpg
Nuclear power plant towers.jpg
Smoke rising from nuclear power plant tower.jpg
Power_and_wind.jpg
Secretary_Kerry_Chats_With_Nigerian_President_Buhari_Before_Their_Meeting_at_the_2016_Nuclear_Security_Summit_in_Washington.jpg
Ivy_Mike_(Eniwetok-Atoll_-_31._Oktober_1952).jpg
Boat_bows_(3).jpg
The_orange_fish_net_float..jpg
Zebra_Dove.jpg
Bursting_Into_Life.jpg
Redrosedust wright f2000.jpg
Steatosis.svg
Hydrogen bomb.svg
Atomic bomb.svg
IFE and MFE parameter space.svg
Radiation symbol alternate.svg
Gamma Camera Parallel Hole Collimator-de.svg
BlankMap-World-180E.svg
Diagram human cell nucleus cs.svg
Pebble bed reactor scheme (English).svg
Pebble bed reactor scheme (Deutsch).svg
Isotopes and half-life eo.svg
Pebble bed reactor scheme (italiano) svg.svg
Japan Electricity Production 2009.svg
Japan Electricity Production.svg
U.S. Electricity Production 2015.svg
Japan Electricity Production 1980-2014.svg
Plant cell structure svg labels.svg
Notable mutations.svg
CD8 receptor.svg
Protein 7 domen.svg
Stat domain structure (zh-cn).svg
Alpha-Methylhistamine.svg
5HT1A-schema.svg
Niaprazine.svg
S32212.svg
Greek lc alpha.svg
Insulin glucose metabolism ZP.svg
Insulin glucose metabolism ZP-ca.svg
Alpha lowercase.svg
Alpha-D-Galactopyranose.svg
AminoAcidball.svg
AlphaHelixSection (blue).svg
AminoAcidball rus.svg
Alpha Dive Flag.svg
2-hydroxy-2-methylbutyric acid.svg
Alpha-D-Mannofuranose.svg
Alpha-D-Mannopyranose.svg
Alpha-D-Altrofuranose.svg
Alpha-D-Altropyranose.svg
Alpha-D-Gulofuranose.svg
Alpha-D-Gulopyranose.svg
Alpha-D-Idofuranose.svg
Alpha-D-Idopyranose.svg
Alpha-D-Galactofuranose.svg
Alpha-D-Talofuranose.svg
Alpha-D-Talopyranose.svg
Alpha-D-Psicofuranose.svg
Alpha-D-Psicopyranose.svg
Alpha-D-Sorbofuranose.svg
Alpha-D-Sorbopyranose.svg
Alpha-D-Tagatofuranose.svg
Alpha-D-Tagatopyranose.svg
Alpha-D-Arabinofuranose.svg
Alpha-D-Arabinopyranose.svg
Alpha-D-Lyxofuranose.svg
Alpha-D-Lyxopyranose.svg
Alpha-D-Ribofuranose.svg
Alpha-D-Ribopyranose.svg
Alpha-D-Ribulofuranose.svg
Alpha-D-Xylulofuranose.svg
Alpha-D-Erythrofuranose.svg
Alpha-D-Threofuranose.svg
Alpha-Tropanol.svg
Example image.svg
Adherens Junctions structural proteins gl.svg
Insulin glucose metabolism ZP (it).svg
Cellular tight junction-gl.svg
Mediterranean_Sea_political_map-mk.svg
Mediterranean_Sea_political_map-it.svg
Schottky barrier forward bias.svg
Schottky barrier zero bias.svg
Schottky barrier reverse bias.svg
Straddling gap heterojunction band diagram.svg
Band filling diagram.svg
Semiconductor vacuum junction.svg
ALAnumbering.svg
Schottky barrier minority carrier injection.svg
Metal semiconductor junction Schottky approximation.svg
Metal semiconductor junction Bardeen picture.svg
Photoelectric diode forward bias.svg
Thermionic diode reverse bias.svg
Thermionic diode forward bias.svg
Dallas County Texas Incorporated Areas.svg
Kelvin probe setup at flat vacuum.svg
Work function mismatch gold aluminum.svg
Mediterranean_Sea_political_map-en.svg
Pendant drop test.svg
Mediterranean_Sea_political_map-fr.svg
World Organization of the Scout Movement-Eurasian Region purple.svg
Terms of Use   Search of the Day