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Spike glycoprotein homotrimer, a main target for neutralization antibody, to bind its receptor, ACE2, and mediate membrane fusion and virus entry. 3D cartoon and Gaussian surface models, white background.

$The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.$

Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet), ampicillin (red).

Dna structure digital concept

3D rendering illustration of some soccer cones

Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.

3d rendering of Bacteria are coated with an extra self-assembled lipid membrane to improve their survival against environmental assaults.

Molecular Model of Human Insulin with disulfide bonds shown.

3D cartoon and Gaussian surface models, PDB 7las, chain id color scheme, white background

plant Leaf of Nerium indicum T.S. under light mircoscope with white background

After dopamine binding, the dopamine receptor changes his shape and binds the inactive G protein.The G protein expels its GDP molecule replacing it by GTP. and falls into two pieces. The Galpha subunit binds to and activates the enzyme adenylyl cyclase, which produces then cyclic AMP spreading a signal through the cell.

Futuristic artificial DNA strand among organic models. Medical innovation and technology concept.

The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.

Myxoid liposarcoma. Myxoid/round cell liposarcoma, or MRCLS, is one of several types of liposarcoma. Liposarcoma is a rare cancer that grows in the cells that store fat in the body. MRCLS usually grows in the arms and legs. These tumors grow slowly, and they can spread to other parts of the body

DNA molecules, structure of the genetic code, 3d rendering,conceptual image.

In vitro bacterial culture

Proliferating cell nuclear antigen (PCNA) is a DNA clamp that acts as a processivity factor for DNA polymerase δ in eukaryotic cells and is essential for replication. PCNA is a homotrimer and achieves its processivity by encircling the DNA, where it acts as a scaffold to recruit proteins involved in DNA replication, DNA repair, chromatin remodeling and epigenetics. 3D cartoon and Gaussian surface models, chain instance color scheme, based on PDB 3wgw, white background.

3D rendering of microscopic particles and bubbles

RNA And DNA concept as a deoxyribonucleic acid or a ribonucleic acid as biological molecules as a symbol of the evolution of life and genetic sequencing.

A ball and stick model of a Polytetrafluoroethylene molecule, also known as PTFE or most commonly Teflon. It is a polymer consisting of only carbon and fluorine atoms. It is used as a non-stick coating for cookware, as a lubricant, and it is also used to contain highly reactive chemicals as it is extremely non-reactive.

macro close up of firebug eggs laid on a glass pane

Chain or ribbon diatom, a type of algae.

A fixed preparation of yeast and hyphae stained with gentian violet that buds under a microscope with immersion

Freshness capsule

3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background

Liver Fluke Section under light microscope with white background

The calcitonin gene related peptide (yellow) binds to its receptor (blue) on neurons and smooth muscle cells of cerebral blood vessels, activating a signal cascade through G-proteins (dark blue) in this cells that leads to a dilatation of the blood vessels (vasodilatation).

Hepatocellular adenoma (HCA; also termed hepatic adenoma) is an uncommon solid, benign liver lesion that develops in an otherwise normal-appearing liver. Typically, HCAs are solitary and are found in young women in association with use of estrogen-containing medications.

Artificial cyber DNA strand. 3D illustration

Close-up shot of a petri dish for checking an antibiotic in the laboratory.

Free Images: "bestof:PDHE1 1NI4.png en ribbon model of pyruvate dehydrogenase subunit E1 PDHE1 of PDH tetramer with thiamin diphosphate as balls from PDB 1NI4 Ref E M Ciszak et al"

Insula Maioricae Vicentius Mut 1683.jpg

Medusozoan phylogeny.svg

Marrellomorpha distribution light.svg

Number of snake envenomings.svg

Ganymede magnetic field.svg

Biological classification L Pengo.svg

Biological classification L Pengo tweaked.svg

World distribution of snakes.svg

Biological classification S Pengo.svg

Standard Model of Elementary Particles.svg

'Le voeu du faisan' Rijksmuseum SK-A-4212.jpeg

Effects of sleep deprivation.svg

Hendrick_ter_Brugghen_-_Bagpipe_Player_-_Google_Art_Project.jpg

Notable mutations.svg

Libyan Uprising-sr.svg

Distribution of Hygrophorus cossus.svg

John_Paul_Jones_by_Charles_Wilson_Peale,_c1781.jpg

PDHE1 1NI4.png

Sorbitol dehydrogenase 1PL8.png

PDB 1ni4 EBI.jpg

Malate dehydrogenase (Sus) 4MDH.png

Aldolase-A 1ALD.jpg

Fructose 1,6-bisphosphatase 1FTA.png

GCL Ecoli 1V4G.png

Shiga toxin B 1DM0.png

Glucokinase 3F9M.png

CYP450-51A1 3LD6.jpeg

MGMT+DNA 1T38.png

Helicase EIF4A1+PDCD4 2ZU6.png

Anthrax-toxin-edema-factor+calmodulin 1XVF.png

Citrate-synthase Acetobacter 2H12.png

GAPDH 1U8F.jpg

PDB 1ik6 EBI.jpg

PDB 2ozl EBI.jpg

Fumarase 3e04.png

Renin 2REN.png

Kallikrein-1 1SPJ.png

Catalase 1DGF.png

PEPCK 1KHF.png

Endostatin 1BNL.png

Ovalbumin 1OVA.png

Factor XI 2F83.png

Antitrypsin 1HP7.png

Amyloid-beta-42 1IYT.png

Asparaginase2 Ecoli 3ECA.png

GCH1-decamer 1FB1.png

Connexin-Cx26 2ZW3.png

Glutathionperoxidase 2F8A.png

TNFB+TNFR 1TNR.png

Allergen Betv1A 1QMR.jpg

CXCL12 1A15.png

Pepsin+Pepstatin 1PSO.png

SCOT 3DLX.png

Ketohexokinase 3NBW.png

Urease 2KAU.png

CD4+MHCII 1JL4.png

Glucuronidase 1BHG.png

ASAT 1AJS.png

Coagulation factor XIII 1EVU.png

Anthrax-lethal-factor 1J7N.png

SODC 2C9U.png

CETP 2odb.png

BAX protein 2K7W.png

GM-CSF+receptor 3cxe.png

PA-83 1ACC.png

Phytase 1IHP.png

PFKFB1 1K6M.png

ApoA1+lipids 3K2S.png

G6PI 1JIQ.png

Hem-hap 4f4o.jpg

Adenylate kinase 2C95.png

Thermolysin 2A7G.png

Thermolysin detail 2A7G.png

BDNF 1BND.jpg

PDB 2iea EBI.jpg

PDB 1l8a EBI.jpg

PDB 2g28 EBI.jpg

PDB 2g25 EBI.jpg

PDB 1rp7 EBI.jpg

PDB 2g67 EBI.jpg

PDB 2qta EBI.png

PDB 2qtc EBI.png

Diphosphomevalonate dicarboxylase 3D4J.png

Leghemoglobin 1FSL.png

GGPP-synthase 2Q80.png

Primase 3B39.png

Lysozyme 1LZ1.png

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