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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 cartoon and molecular surface models, chain id color scheme, putative membrane shown, pdb 1l7v, white background
A ribbons model of Human Insulin. Isolated on white.
Science background with molecule or atom
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.
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.
Chain of amino acid or bio molecules called protein - 3d illustration
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
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
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.
3D cartoon and Gaussian surface models, PDB 6gu2, white background
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.
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.
3d helix chromosome or Dna structure, technology science background. 3d render illustration
Acetylcholine receptors in the lipid layer of cell membrane.
DNA and biotechnology concept
The Raf/MEK/ERK (MAPK) propagates growth signals in the cell. Misregulation can lead to cancer.\nThe red dots on the active EGFR are phosphorylated tyrosines. PDB entries: 1egf, 1nql, 1m17, 2jwa, 3njp, 2gs6, 1gri, 1xd2, 3ksy, 5p21, 6xi7, 6q0j, 2y4i,
Wireframe double helix DNA
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
A conceptual image of an abstract network of multi-coloured organic strands arranged in a non regular pattern all connected together in a complex manner. The network is made from smaller multi-coloured squares and polyhedra, in vivid colours against a pastel toned background. Shows background and foreground elements to the structure.
Dna structure on science background. 3d illustration
Dna structure digital concept
Nourish hair of shampoo or serum. Repair damaged hair concept, 3d rendering.
Cells in the body examined by endoscope
GABA B receptors  are G protein-coupled receptors, also called metabotropic receptors.  Binding of  an agonist (here baclofen, red) leads to a G-protein coupled C-AMP signaling pathway. Source: PDB entries 7eb2, 6r3q,.
Artificial Intelligence Sustainable Responsible Technology
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.
Particles, medical concept
Free Images: "bestof:PDB 2bbj EBI.jpg Membrane and cell surface proteins and peptides Transmembrane helix hairpin Magnesium transport protein CorA transmembrane region Magnesium"
Lipid raft organisation scheme.svg
Human genome by functions.svg
Electron transport chain.svg
Scheme facilitated diffusion in cell membrane-en.svg
Scheme facilitated diffusion in cell membrane-zh.svg
ETC electron transport chain.svg
Scheme facilitated diffusion in cell membrane-eo.svg
2ph1 pdb gallery nucleotide binding-protein-2 (MinD homolog).svg
Scheme facilitated diffusion in cell membrane-zh (zh-tw).svg
Endocytosis types.svg
Exocytosis types.svg
Cell membrane detailed diagram blank.svg
Intermediate filament.svg
Scheme facilitated diffusion in cell membrane-ca.svg
Hepatitis B virus v2.svg
Insulin glucose metabolism ZP.svg
Cellular tight junction keys.svg
Insulin glucose metabolism ZP-ca.svg
PDB 2bbj EBI.jpg
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PDB 2rcr EBI.jpg
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PDB 4rcr EBI.jpg
PDB 2e74 EBI.jpg
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PDB 2d2c EBI.jpg
PDB 1l9b EBI.jpg
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PDB 3d38 EBI.png
PDB 1pp9 EBI.jpg
PDB 1ntm EBI.jpg
PDB 1l0l EBI.jpg
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PDB 1sqb EBI.jpg
PDB 1l0n EBI.jpg
PDB 1nu1 EBI.jpg
PDB 1be3 EBI.jpg
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PDB 1qcr EBI.jpg
PDB 1bcc EBI.jpg
PDB 2bcc EBI.jpg
PDB 3bcc EBI.jpg
PDB 2oau EBI.jpg
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