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A ball and stick + ribbons model of human Interleukin 2 or IL-2. Interleukin is a hormone which acts as a signalling molecule for the immune system.
3D cartoon and Gaussian surface models. PDB 2aai, white background.
Glucose-6-phosphate dehydrogenase (G6PD) protein. Enzyme of the pentose phosphate pathway that generates co-enzyme NADPH. 3D illustration.
Abstract geometric shape
PETase (left) degrades  polyethylene terephtalate (PET) into monohydroxyethyl terephthalate (MHET) and MHETase degrades MHET ethylene glycol (EG) and terephthalic acid (TPA). The substrates in the binding sites are depicted in red.
Model of protein alpha helices forming an ion channel.
Abstract Pink And Green Knot
Fictitious molecule model inside red and blue pill isolated on white.
Cholera toxin, molecular model. Cholera toxin (choleragen) is a protein complex secreted by the bacterium Vibrio cholerae, that causes the disease cholera. It is made up of a wedge-shaped A subunit (right part of illustration) and five B subunits (left part of illustration) that form a ring which binds to the intestinal lining. In its most severe forms, cholera is one of the most rapidly fatal illnesses known.
A ball and stick + ribbons model of HIV protease - an enzyme that is the target of much AIDS and HIV research.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 5y0m, white background
Abstract geometric shape
Indoleamine 2,3 dioxygenase 1 (IDO1) protein. Tryptophan catabolic enzyme of the kynurenine pathway. 3D illustration.
DNA A-T Pair
Remdesivir is a broad-spectrum antiviral medication, it is a specific treatment for COVID-19. 3d illustration
Artificial molecular structure in many colors. Horizontal composition, isolated on white background.
Organic shape 3d virus model isolated on black background, medical 3d rendering illustration
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.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 4ci9, white background
Colorful abstract pattern.
Beta-amyloid (Abeta) peptide, 3D rendering. Major component of plaques found in Alzheimer's disease. Cartoon representation.
Molecular model of tyrosine, one of 20 required amino acid to form proteins.
Isolated Proteasome with protein conjugated with ubiquitin 3d rendering
Acetylcholine is an organic chemical that functions in the brain and body of many types of animals including humans as a neurotransmitter. 3d illustration
A model of a benzopyrene binding to a strand of DNA. Benzopyrenes are mutagenic and highly carcinogenic - that is, they cause mutations and cancer. They result from the combustion of organic material - common carcinogenic routes being burning fossil fuels or smoking tobacco. As a mutagen it binds to, and alters the chemical structure of, DNA.
3D cartoon and Gaussian surface models, PDB 3hg3, white background
Multi-colored connected spheres building a molecular structure.
Taq polymerase (Thermus aquaticus polymerase) enzyme bound to DNA, 3D rendering. Protein used in PCR (polymerase chain reaction).
A glowing DNA molecule model
Free Images: "bestof:PDB 2bnm EBI.jpg All beta proteins Double-stranded beta-helix RmlC-like cupins TM1459-like Hydroxypropylphosphonic acid epoxidase Fom4 C-terminal domain"
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