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Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet), ampicillin (red).

A ball and stick model of the common sugar sucrose.

Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration

3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background

$Model of DNA Base Pair adenine (A) and thymine (T)\n\nFind more molecules in the Lightbox [url=http://www.istockphoto.com/search/lightbox/7500191][i] 'World of Molecules'[/i][/url], or contact me on customized design/rendering of any molecules in 3D (see some examples below). \n\n[img]http://www.drugmodel.com/360/superglassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/capsule900.jpg[/img] \n[img]http://www.drugmodel.com/360/glassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/heart900.jpg[/img] \n[img]http://www.drugmodel.com/360/viruskiller900.jpg[/img] \n[img]http://www.drugmodel.com/360/mesh900.jpg[/img] \n[img]http://www.drugmodel.com/360/cartoon900.jpg[/img] \n[img]http://www.drugmodel.com/360/photo900.jpg[/img] \n[img]http://www.drugmodel.com/360/ovoid900.jpg[/img] \n[img]http://www.drugmodel.com/360/swirlcone900.jpg[/img] \n[img]http://www.drugmodel.com/360/super900.jpg[/img] \n[img]http://www.drugmodel.com/360/glowing900.jpg[/img]$

$Organic Carnauba Wax in Chemical Watch Glass with molecular structure place next to beaker and \nPlatycerium stemaria fern. Chemical ingredient used in cosmetic industry.$

After dopamine binding, the dopamine receptor changes his shape and binds the inactive G protein.The G protein expels its GDP molecule replacing it by GTP. and falls into two pieces. The Galpha subunit binds to and activates the enzyme adenylyl cyclase, which produces then cyclic AMP spreading a signal through the cell.

$Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.$

cod liver omega 3 capsules fish oil in the shape of a fish with a place for text on a blue 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.

Tetradecylthioacetic acid molecule. 3D rendering. Atoms are represented as spheres with conventional color coding.

Copper(II) sulfate with molecular structure. Chemical ingredient used in medical and public health issues.

B-chain pentamer and A-chain subunit (green), 3D cartoon and Gaussian surface model, white background

Nourish hair of shampoo or serum. Repair damaged hair concept, 3d rendering.

Folic acid, folate molecule. It is known as vitamin B9. Molecular model. 3D rendering. Illustration

Calcium carbonate chip in chemical watch glass with molecular structure on white laboratory table. Top view

Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease inflammation in conditions such as asthma, COPD, and rheumatologic diseases.

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.

Monosodium glutamate, MSG or sodium glutamate molecules. MSG is used in cooking as a flavor enhancer with an umami taste 3d rendering

Science background with molecule or atom

Free Images: "bestof:Mechanism for the binding of ATP and then Ubiquitin substrate to the ubiquitin activating enzyme.png en A mechanism showing how ATP and the ubiquitin substrate"

Substrate-level phosphorylation generating ATP.svg

Animal mitochondrion diagram en (edit).svg

Animal mitochondrion diagram unlabelled.svg

Mechanism for the binding of ATP and then Ubiquitin substrate to the ubiquitin activating enzyme.png

Ubiquitin-activating enzyme bound to ATP and ubiquitin substrate.png

Ubiquitin-activating enzyme bound to Ubiquitin.png

Simple mechanism of enzyme reaction (zh-tw).png

Ubiquitin activating enzyme cysteine highlighted.png

Cys and Arg active site of ubiquitin activating enzyme.png

Anthrax-toxin-edema-factor+calmodulin 1XVF.png

Nucleophilic Epoxidation Mechanism2.tiff

Substrate-like inhibitors and binding to the DPP-4 complex.png

Simple mechanism of enzyme reaction zh.png