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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
Cells in the body examined by endoscope
Proteasomes are molecular machines for breaking down proteins called proteolysis, only target proteins that have been marked for destruction called ubiquitin to the target protein, 3d rendering
3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen
3D cartoon and Gaussian surface models, PDB 5fwk, white background
Inside protein molecule
Science background with molecule or atom
nanotechnology and abstract graphene structures
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
Energy exchange of electrons between atoms
DNA close-up, DNA Molecule Model, DNA Strands, DNA animation
Computer generated abstract concept image of 3d spheres like metaphor of abstract business processes.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
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 rendered Gastric inhibitory polypeptide (GIP, glucose-dependent insulinotropic peptide) endocrine protein hormone, 3D illustration
Overhead aerial drone view of oyster farm racks at low tide, flying at a low altitude to be able to see the detail of the oyster racks and seaweed. Located in a tidal estuary in Sutherland, Scotland. the low tides enable workers to access the racks for turning the oysters as they grow. Oysters have been farmed for many hundreds of years using this method. Seaweed has grown around the metal lines of racks.
p53 (blue) tagged with ubiquitin (yellow) is degraded into small peptides by a proteasome (violett). p53 prevents cancer formation and acts as a guardian of the genome. Mutations in the p53 gene contribute to about half of the cases of human cancer.
This footage shows the translation initiation complex, which consists of the ribosomal small subunit, transfer RNA (tRNA), and translation initiation factors. The golden ribbon represents the RNA.
Biological protein and molecule, 3d rendering. 3D illustration.
Liquid bubbles up Fluid Twirl
3D cartoon and Gaussian surface models, PDB 6rwb, white background
DNA A-T Pair
Tryptophan or Trp is an alpha-amino acid that is used in the biosynthesis of proteins, 3d illustration
Molecular structure of Sulfur dioxide SO2
Bacterial dehalogenases remove halogen atoms from organic compounds. The one shown here is a reductive dehalogenase from PDB entry 4ur0. It uses a cobamide cofactor (orange) and iron-sulfur clusters to reduce the substrate. Dehalogenases may be used as a way to clean up areas polluted with halogenated compounds.
A molecular model of the flavonoid Quercetin.  An antioxidant and anti-inflamatory, it is used as a nutritional suplement.  It is commonly found in many fruits and vegetables and is a significant chemical component of tea.  Isolated on white.
Nourish hair of shampoo or serum. Repair damaged hair concept, 3d rendering.
Computer generated 3D render of ball and stick molecules.
3D cartoon and Gaussian surface models, PDB 4cmh, white background
Digital background depicting innovative technologies in (AI) artificial systems, neural interfaces and internet machine learning technologies
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