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Phenylalanine hydroxylase (PAH) (EC 1.14.16.1) is an enzyme that catalyzes the hydroxylation of the aromatic side-chain of phenylalanine to generate tyrosine. 3D cartoon and Gaussian surface models, chain id color scheme, based on PDB 2pah, white background.
3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen
Biological protein and molecule, 3d rendering. 3D illustration.
Science or medical concept. Molecular structure on black background
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 a Polytetrafluoroethylene molecule, also known as PTFE or most commonly Teflon. It is a polymer consisting of only carbon and fluorine atoms. It is used as a non-stick coating for cookware, as a lubricant, and it is also used to contain highly reactive chemicals as it is extremely non-reactive.
alien structure made of white spheres and flowing glass liquid, molecular, hi-tech concept, abstract design element
sheres on colored backgrounds
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Molecular structure of Chloroform CHCl3
Molecular model of antibody taking part in immune defense. Molecule of immunoglobulin, 3D illustration
Slice of natural crystal for patterns and textures use with high resolution.
Yohimbine(quebrachine), is an indole alkaloid. C21H26N2O3. Chemical structure model: Ball and Stick + Balls + Space-Filling. 3D illustration.
Birth of Life, Evolution and Circulating Cells
Tryptophan molecule structure 3d illustration with clipping path
Computer generated abstract concept image of 3d spheres like metaphor of abstract business processes.
Deacetoxycephalosporin-C synthase (DAOCS) is a mononuclear ferrous enzyme that transforms penicillins into cephalosporins. 3D cartoon and Gaussian surface models, chain instance color scheme, based on PDB 1uof, white background.
Structural model of Benzene molecule
A close-up 3D rendering of antibody-conjugated magnetic nanoparticles.
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.
Science background with molecule or atom
Inside protein molecule
Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration
Science or medical concept. Molecular structure on black background
3D cartoon and Gaussian surface models, chain id color scheme, PDB 2y73, white background
Molecular structure of Methane CH4
3d rendering of benzene molecules conjugated gold (Au) nanoparticles (NPs) on the black 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.
Molecule with biology and chemical concept, 3d rendering. Digital drawing.
High resolution 3d illustration.
Free Images: "bestof:Ditophal 3D spacefill.png Space-filling model of the ditophal molecule an anti-leprosy drug Colour code 505050  Carbon  C  black<br> F0F0F0  Hydrogen  H"
crown-5-3d-spacefill-ether-model-835896.png
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retinal-cis-3d-spacefill-model-835851.png
tetrahydrocannabinol-hydroxy-thc-3d-835853.png
biotin-spacefill-b-vitamin-model-910243.png
annulene-cyclotetradecaheptaene-835643.png
pyran-heterocycle-spacefill-ball-835809.png
tetramethyluronium-trifluoromethyl-835794.png
aminomethylcyclopropane-cis-model-835640.png
octene-spacefill-alkene-ball-model-835813.png
dioxin-heterocycle-spacefill-ball-835807.png
chlorofluorocarbon-fluoroethane-835796.png
Hydrogen-sulfide-3D-vdw.svg
Ditophal 3D spacefill.png
Ditophal 3D ball.png
Atipamezole-3D-spacefill.png
Conivaptan-3D-spacefill.png
Diclofenamide-3D-spacefill.png
Trichlormethiazide-3D-spacefill.png
Clofenamide-3D-spacefill.png
Tidiacic-3D-spacefill.png
Rolziracetam-3D-spacefill.png
Acefylline 3D spacefill.png
Acetazolamide 3D spacefill.png
Guanazodine 3D spacefill.png
Asenapine-3D-spacefill.png
Oxetorone-3D-spacefill.png
Riociguat-3D-spacefill.png
Cadralazine-3D-spacefill.png
Acedapsone-3D-spacefill.png
Meladrazine-3D-spacefill.png
Dihydralazine-3D-spacefill.png
Hydralazine-3D-spacefill.png
Pargyline-3D-spacefill.png
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Etonitazene 3D spacefill.png
Guanethidine 3D spacefill.png
Temozolomide-3D-spacefill.png
Ifosfamide-3D-spacefill.png
Vildagliptin-3D-spacefill.png
Celecoxib-3D-spacefill.png
Elesclomol-3D-spacefill.png
Tegafur-3D-spacefill.png
Tolmetin-3D-spacefill.png
Acarbose-3D-spacefill.png
Altretamine-3D-spacefill.png
Trofosfamide-3D-spacefill.png
Thymectacin-3D-spacefill.png
Demecolcine 3D spacefill.png
Lisofylline 3D spacefill.png
Bicalutamide 3D spacefill.png
Doxorubicin 3D spacefill.png
Halichondrin B 3D spacefill A.png
Dexamethasone 3D spacefill.png
Estramustine 3D spacefill.png
Naphthylpiperazine-3D-spacefill.png
Cyanopindolol-3D-spacefill.png
Iodocyanopindolol-3D-spacefill.png
Tirapazamine-3D-spacefill.png
ZD6126-3D-spacefill.png
Firocoxib-3D-spacefill.png
Fluotracen-3D-spacefill.png
Clioquinol 3D spacefill.png
Piroxicam 3D spacefill.png
Droxicam 3D spacefill.png
TB-21007-3D-spacefill.png
Nitrazepate-3D-spacefill.png
NAN-190-3D-spacefill.png
UH-301-3D-spacefill.png
Cytisine 3D spacefill.png
Paraxanthine 3D spacefill.png
Prothionamide 3D spacefill.png
Pyrazinamide 3D spacefill.png
Losigamone 3D spacefill.png
Taranabant 3D spacefill.png
Flumedroxone 3D spacefill.png
Melarsoprol-3D-spacefill.png
Colchicine-3D-spacefill.png
Sumatriptan-3D-spacefill.png
Nitrendipine-3D-spacefill.png
Disulfiram 3D spacefill.png
Fludorex 3D spacefill.png
Ethosuximide 3D spacefill.png
Benzylpiperazine-3D-spacefill.png
JNJ-7777120-3D-spacefill.png
Caffeine (1) 3D spacefill.png
Caffeine (2) 3D spacefill.png
Fexofenadine 3D spacefill.png
Halichondrin B 3D spacefill B.png
Methohexital-3D-spacefill.png
Nitroscanate-3D-spacefill.png
Losartan-3D-spacefill.png
1-Iodomorphine-3D-spacefill.png
Tepoxalin-3D-spacefill.png
Mercaptopurine 3D spacefill.png
Tioguanine 3D spacefill.png
Nicotinyl methylamide 3D spacefill.png
Mafosfamide-3D-spacefill.png
Fialuridine-3D-spacefill.png
Gefarnate-3D-spacefill.png
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