Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
A carboxypeptidase is a protease enzyme that hydrolyzes a peptide bond at the carboxy-terminal end of a protein or peptide. 3D cartoon model, secondary structure color scheme, PDB 2v77, white background.
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.
Beta-amyloid (Abeta) peptide, 3D rendering. Major component of plaques found in Alzheimer's disease. Cartoon representation.
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.
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
Molecular Model of Human Insulin with disulfide bonds shown.
Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy
organic chemistry, model of the protein molecule - illustration of a biological particle
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.
Ferritin is a protein that contains iron and is the primary form of iron stored inside of cells. 3D cartoon model, PDB 4y08, white background
plant Pine Young Staminate Cone L.S. under light mircoscope with white background
The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.
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.
Rapamycin, also known as sirolimus is a macrolide compound that has immunosuppressant functions and prevents transplant rejection through the inhibition of  the protein complex mTORC1.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
organic chemistry: 3d structure of cholesterol molecule with chemical formula and 2d model - illustration of biological particle isolated
Quantum Gravity 3d rendered image of a comprehensive exploration of Quantum Gravity theories. String theory, loop quantum gravity (LOG), causal dynamical triangulation, twistor theory, gravitational waves, spacetime, gravity waves, quantum mechanics, quantum entanglement concepts.
3D cartoon and Gaussian surface models, PDB 2zva, white background
Spiral Balls
Aromatase (estrogen synthase) enzyme. Protein responsible for the key step in the synthesis of estrogens. 3D illustration. Cartoon representation.
Molecular Model of Vitamin A,\n.\n_______________________________________________\nFind other Molecules in my Lightbox [url=http://www.istockphoto.com/search/lightbox/7500191][i] 'World of Molecules'[/i][/url]\n[url=http://www.istockphoto.com/search/lightbox/7500191][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=25027326[/img][/url]  [url=http://www.istockphoto.com/search/lightbox/7500191][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=15306802[/img][/url] \nFind other Molecules in my Lightbox [url=http://www.istockphoto.com/search/lightbox/13145593][i] 'Drug and Cure'[/i][/url]\n[url=http://www.istockphoto.com/search/lightbox/13145593][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=25100409[/img][/url]  [url=http://www.istockphoto.com/search/lightbox/13145593][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=25150570[/img][/url] \nFind other Molecules in my Lightbox [url=http://www.istockphoto.com/search/lightbox/13539420][i] 'Science & Medicine'[/i][/url]\n[url=http://www.istockphoto.com/search/lightbox/13539420][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=25149885[/img][/url]  [url=http://www.istockphoto.com/search/lightbox/13539420][img]http://www.istockphoto.com/file_thumbview_approve.php?size=2&id=22817974[/img][/url]
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
Green bubble shapes connected in a larger biological structure. Close-up, selective focus, horizontal composition.
Dopamine is released when your brain is expecting a reward. Human brain producing dopamine molecule 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.
The coronavirus main protease plays a pivotal role in viral gene expression and replication through the proteolytic processing of replicase polyproteins and is an attractive target for anti-CoV drug design. A computer 3D cartoon interaction complex model, white background.
A single tree grows in a quiet space. A tree with a very balanced shape. It bears light pink berries.\nShades of Japanese spring. Tree with pink rice cakes.
PETase is a bacterial enzyme that breaks down PET-plastic to monomeric molecules. The whole bacterial degradation process yields terephtalic acid and ethylene glycol, which are environmentally harmless.
pink podiums on a white branch with red spheres,
Free Images: "bestof:Corticosteroid-Binding Globulin.png en Corticosteroid-Binding Globulin structure pl Struktura białka wiążącego kortykosteroidy own Doxepine 10 05 2009"
Indianmeal moth 2009.jpg
Alexis-Rivera-Curet.jpg
Hawaiian sunrise 10.JPG
ChildLabour-India.JPG
Voie Verte Trans-Ardennes à Laifour.JPG
20090510 Shanghai Jiangxi road wires.jpg
Cetonia aurata 2009 G1.jpg
Cetonia aurata 2009 G2.jpg
Cetonia aurata 2009 G3.jpg
Hypera zoilus Kaldari 01.jpg
Cucurbita moschata Butternut 2012 G2.jpg
View toward Samoëns from below Tête des Saix.jpg
Oryctes nasicornis male 2012 G1.jpg
Color coded racetrack large channel.gif
Chartres - cathédrale - rosace nord.jpg
Perfect pic 3.JPG
Masai.JPG
KohimaramaSunrise.JPG
Storch-nest.jpg
Mauricio-Salles.jpg
Taiwo-Atieno.jpg
Homebred goat.jpg
Sixtomat BW 1.jpg
Decomposing possum.jpg
Alex-Surprenant.jpg
Sake Hachimangu.jpg
Nk ivanska.jpg
Kaingaroa Beach.jpg
Bois coupé structure.jpg
Goat of Margarita.jpg
Budapest Hungary 05.jpg
Lwowska_Galeria_Sztuki_-_Jacek_Malczewski_-_Pithia_2.jpg
Pierre-Rudolph-Mayard.jpg
Sunrise over Frenchman Bay.JPG
Heath Ohio Sunset 1.JPG
Heath Ohio Sunset 2.JPG
Chacachacare Pier.jpg
Chacachacare Pier 2.jpg
Spring Chacachacare.jpg
Spring Chacachacare 4.jpg
Chacachacare boats.jpg
Cola de Raton.jpg
Assisi San Rufino BW 2.JPG
Assisi San Rufino BW 5.JPG
Sommerhausen BW 16.JPG
Sablet.JPG
Yongdinggate.jpg
Sunriseinthemorning.JPG
ഗാന്ധിജിയുടെ അന്ത്യവിശ്രമസ്ഥലം.jpg
El Yaque sunset.jpg
Laguna de Raya 2.jpg
Laguna de Raya.jpg
Dog in Chacachacare.jpg
Boat in Chacachacare 2.jpg
Boats in Chacachacare 2.jpg
Police in Porlamar.jpg
Parque Cristal, Caracas.JPG
construction-site-257326.jpg
Unkonwn plant.jpg
Durbar-Square-in-Kathmandu.jpg
Durbar-Square-in-Kathmandu.jpg
CCHS baseball game.jpg
Contaflex BW 1.JPG
Isosuo.jpg
Poruni river.jpg
Tuned '05-'09 Honda S2000 (Orange Julep '10).jpg
Oriental hybrid1.jpg
Manly Beach in November 2007.jpg
Pantanal Sunset.JPG
Bunch of bananas on sale.jpg
Fish in El Manglillo b.jpg
Selva del Estado Anzoategui en Chaguaramal.jpg
gem-jewellery-trailers-agate-246855.jpg
Bellagio-282812.jpg
Carduus crispus 2009 G2.jpg
Cavelake.JPG
Singapore Skyline at Night with Black Sky.JPG
Water droplets on leaf.jpg
Vernazza from above.JPG
Trier Sankt Paulin BW 11.jpg
Dinkelsbuehl BW 6.JPG
Dinkelsbuehl BW 9.JPG
Dinkelsbuehl BW 10.JPG
Contaflex BW 2.JPG
WhfPallasCat.JPG
Mather Point Grand Canyon South Rim.jpg
Clematis 'Nelly Moser'.JPG
Landscape of Okaya.jpg
Olkiluoto 1&2.jpg
Thiodina sylvana female 03.jpg
Gussmetallschmelze.jpg
Grotta del Vento 01.JPG
Petra Jordan BW 34.JPG
Petra Jordan BW 36.JPG
Petra Jordan BW 37.JPG
Butterfly Black and White July 2009.JPG
Potato with sprouts.jpg
Colonial house in downtown Maracaibo.jpg
Gyuu-don 001.jpg
Holiday Beach, Haikou looking west - 01.jpg
Terms of Use   Search of the Day