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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.

Biological protein and molecule, 3d rendering. 3D illustration.

A ball and stick model of a molecule of Human Interferon. Interferons are proteins important in the working of the immune system and are produced in large numbers in the presence of viruses, bacteria, tumors and parasites. Interferons are used in drugs to combat cancer, multiple sclerosis, hepatitis B and C and other diseases. Isolated on white.

A new antibiotic (zosurabalpin, red) traps lipopolysaccharide (orange) in the intermembrane transporter of the Gram-negative bacterium Acinetobacter baylyi

alien structure made of white spheres and flowing glass liquid, molecular, hi-tech concept, abstract design element

Science or medical concept. Molecular structure on black background

White spheres surrounded blue water liquid. Futuristic, water splash, abstract 3D illustration

3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen

Deacetoxycephalosporin-C synthase (DAOCS) is a mononuclear ferrous enzyme that transforms penicillins into cephalosporins. 3D cartoon and Gaussian surface models, chain instance color scheme, based on PDB 1uof, white background.

Simplicity chemical molecule with white background, 3d rendering. Computer digital drawing.

Blue connected molecules on white background. Horizontal composition with copy space.

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

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.

Yohimbine(quebrachine), is an indole alkaloid. C21H26N2O3. Chemical structure model: Ball and Stick + Balls + Space-Filling. 3D illustration.

3D realistically coloured hexagonal shapes of connected spheres, background with copy space. Futuristic illustration design template for scientific presentation. Molecular business, science, teamwork concept.

Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration

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Science background with molecule or atom

Computer generated 3D render of ball and stick molecules.

A 3D rendering of a polymer chain. The chain is made up of individual monomers, which are linked together by chemical bonds

A ball-and-stick 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.

TNF- (blue) is the most potent proinflammatory cytokine and is crucial in the pathogenesis of PsA. TNF- inhibitors considerably relieve symptons in patients. A therapeutic antibody (adalimumab) blocks the receptor binding site of TNF-.

3D cartoon and Gaussian surface model, chain id color scheme, PDB 3v7t, white background

Abacavir molecule structure. Three dimensional model render

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