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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
3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen
3d rendering of benzene molecules conjugated gold (Au) nanoparticles (NPs) on the black background
Chemical formula of Cortisol
Melatonin is a hormone, released primarily by the pineal gland, that regulates the sleep–wake cycle. 3D ball-and-stick model, white background
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.
Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration
Fictitious molecule model inside red and blue pill isolated on white.
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
DNA and biotechnology concept
3d render of molecular structure of sulfuric acid isolated over white background Atoms are represented as spheres with color and chemical symbol coding: hydrogen(H) - blue, oxygen(O) - green, sulfur(S) - orange.
Chemical formula of Progesterone
Triacetin, glycerin triacetate molecule. It is triglyceride, triester of glycerol, food additive with E number E1518. Molecular model. 3D rendering. 3D illustration
Blue connected molecules on white background. Horizontal composition with copy space.
Halofantrine is a drug used to treat malaria. Halofantrine's structure contains a substituted phenanthrene, and is related to the antimalarial drugs quinine and lumefantrine. 3d illustration
Structural model of Benzene molecule
Chemical formula of Progesterone. Close-up.
3D realistically coloured hexagonal shapes of connected spheres, background with copy space. Futuristic illustration design template for scientific presentation. Molecular business, science, teamwork concept.
Microcrystalline wax with chemical formula on white laboratory table.
Chemical formula of Aldosterone
3D cartoon and Gaussian surface model, chain id color scheme, PDB 3v7t, white background
A molecular model of Bisphenol A or BPA.  It is a common building block in the production of many epoxy resins and plastics including polycarbonate plastic. As such it is present in a huge range of food packaging and household products. There are now concerns about its health effects, particularly its effect on children, infants and fetuses.   Isolated on white.
Folic acid, folate molecule. It is known as vitamin B9. Molecular model. 3D rendering. Illustration
Molecular structure of Sulfur dioxide SO2
Mefloquine is a medication used to prevent or treat malaria.When used for prevention it is taken once a week and should be started one or two weeks before potential exposure. 3d illustration
3D rendering of an icon with an expanded effect
Molecular structure of Acetylcysteine(also known as N-acetylcysteine or NAC). C5H9NO3S. Chemical structure model: Ball and Stick + Balls + Space-Filling. 3D illustration.
Crystal Lattice
3d rendering of H2O or water molecule inside the fullerene C60 cage
A model of a molecule of Asparagine, an amino acid. Amino acids are the building blocks of proteins and have many functions in metabolism.
Free Images: "bestof:Bipy-2D-skeletal.png Skeletal formula of 2 2'-bipyridine also known as bipy Structure drawn in http //www cambridgesoft com/software/ChemBioDraw/ ChemBioDraw"
Graham_Wallas_(right),_K.B._Smellie_(left),_1925.jpg
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