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Chain of Amino Acid. Proteins consist of one or more chains of amino acids called polypeptides
Immunotherapy of Alzheimer's disease: Monoclonal antibody (light blue) bound to an amyloid beta peptide (orange),  that is aggregated to amyloid beta fibrils, which build up amyloid plaques.
3d helix chromosome or Dna structure, technology science background. 3d render illustration
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.
3D cartoon and Gaussian surface models, PDB 6gu2, white background
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.
DNA Molecule: a 3D illustration of the double helix structure reflecting the genetic code. This 3D illustration is a visualization of the DNA molecule showing its characteristic double helix structure. The model reflects the major components of DNA such as the nitrogenous bases (adenine, thymine, guanine, and cytosine), sugars, and phosphate groups that together form the genetic code. This illustration can be used for educational purposes, scientific publications or medical advertising to demonstrate the complexity and beauty of the molecule responsible for heredity and the development of life on Earth.
Ball and stick 3D render of the caffeine molecular structure.
Science background with molecule or atom
CRISPR-Cas9 gene editing technology
From left to right: the NMDA and  AMPA receptors transport calcium cations into neurons after being activated by the neurotransmitter glutamate and  the GABA receptor (right) transport chloride anions after the activation by gamma aminobutyrate. PDB entries: 6wht,  3kg2, 6d6u
DNA and biotechnology concept
B-chain pentamer and A-chain subunit (green), 3D cartoon and Gaussian surface model, white background
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.
DNA. Abstract 3d polygonal  DNA molecule. Medical science soft color , genetic biotechnology, chemistry biology or gene cell concept  illustration or background. innovation technology concept  3D rendering
3d Render DNA Molecule Structure & Red, Science and Medicine Concept, Depth Of Field
Illustration of DNA.
DNA structure genetic biotechnology, 3d rendering
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
DNA.Computer generated abstract background.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
A ribbons model of Human Insulin. Isolated on white.
Dna structure on science background. 3d illustration
Wireframe double helix DNA
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
Artificial Intelligence Sustainable Responsible Technology
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).
Futuristic artificial DNA strand among organic models. Medical innovation and technology concept.
SARS-CoV-2 ORF3a is a putative viral ion channel implicated in autophagy inhibition, inflammasome activation and apoptosis. 3D cartoon and Gaussian surface models, based on PDB 7kjr, white background.
Particles, medical concept
Free Images: "bestof:PDB 1ppj EBI.jpg Membrane and cell surface proteins and peptides Single transmembrane helix Cytochrome c1 subunit of cytochrome bc1 complex Ubiquinol-cytochrome"
Electron transport chain.svg
ETC electron transport chain.svg
P450cycle.svg
Lipid raft organisation scheme.svg
Hepatitis B virus v2.svg
Cellular tight junction keys.svg
PDB 1ppj EBI.jpg
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