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Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen
Folic acid, folate molecule. It is known as vitamin B9. Molecular model. 3D rendering. Illustration
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.
B-chain pentamer and A-chain subunit (green), 3D cartoon and Gaussian surface model, white background
Inside protein molecule
Nourish hair of shampoo or serum. Repair damaged hair concept, 3d rendering.
Fatsia japonica, commonly called Japanese aralia, Glossy-leaved paper plant, Big-leaf paper plant, and Figleaf palm, is an evergreen shrub or small tree that is native to Japan. It is an attractive foliage plant noted for its palmately lobed glossy dark green leaves that typically have 7-9 deep lobes. Small creamy flowers in umbels bloom in fall, followed by black berries.
Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration
Chemical formula of Progesterone
How a lithium ion battery works, 3d render, section. Battery charging and discharging. Ions flow from the anode to the cathode separated by a liquid electrolyte as the battery discharges energy
3D realistically coloured hexagonal shapes of connected spheres, background with copy space. Futuristic illustration design template for scientific presentation. Molecular business, science, teamwork concept.
The human immunodeficiency virus single-stranded RNA genome is converted into double-stranded DNA by the viral reverse transcriptase and then the DNA is integrated in the DNA of an infected human cell. The reverse transcriptase is one of the main targets to disrupt the virus multiplication through an inhibitor. There are nucleoside and nucleotide inhibitors and non nucleoside analogue inhibitors.
3d Render Transparent Molecule on Gradient Green Background, Science and Medicine Concept, (Depth Of Field)
Aldehyde dehydrogenase is a polymorphic enzyme responsible for the oxidation of aldehydes to carboxylic acids, which leave the liver and are metabolized by the body’s muscle and heart. 3D cartoon and Gaussian surface models, chain id color scheme, based on PDB 1nzw, white background.
Division of Human Cancer Cells
Calcium carbonate chip in chemical watch glass with molecular structure on white laboratory table. Top view
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.
Aerial view of loyster farm by Ardara, County Donegal - Ireland.
Open capsule or pill with molecular structure. Nanotechnology concept
Monosodium glutamate, MSG or sodium glutamate molecules. MSG is used in cooking as a flavor enhancer with an umami taste 3d rendering
Molecular model of amylose, one of the two sugar components in starch.
Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease inflammation in conditions such as asthma, COPD, and rheumatologic diseases.
3d render Science Medical Molecule Orange (Depth Of Field)
Hyaluronan, hyaluronic acid, HA, hyaluronate molecule, short fragment. Molecular model. 3D rendering. Illustration
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.
Microcrystalline wax with chemical formula on white laboratory table.
3D Illustration of Vitamin C Molecule
Cannabidiolic acid or CBDA cannabinoid molecule. 3D rendering. Atoms are represented as spheres with conventional color coding.
Chemical & medical background
Free Images: "bestof:Dimethylchlorosulfonium Formation Mechanism.png Reaction mechanism of dimethylchlorosulfonium chloride formation in the Swern reaction Author date of creation"
Simple mechanism.svg
Enolate aldol formation mechanism-fr.svg
Enol aldol formation mechanism-fr.svg
Enolate aldol formation mechanism-id.svg
Enol aldol formation mechanism-id.svg
HOBT mechanism is.svg
Saure Aldoladdition-Mechanismus.svg
Basische-Aldoladdition-Mechanismus.svg
P450cycle.svg
SNAr mechanism.svg
Aromatic SN1 mechanism.svg
Sakurai Reaction Scheme.svg
Darzens Reaction Scheme.svg
Grignard reaction mechanism.svg
NHK reaction mechanism.svg
Ninhydrin Reaction Mechanism.svg
Shapiro reaction mechanism.svg
Perkin reaction mechanism.svg
Knoevenagel reaction mechanism 1.svg
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Knoevenagel reaction mechanism 3.svg
Bechamp reaction mechanism.svg
Biginelli reaction mechanism.svg
Barton reaction mechanism.svg
Biginelli reaction mechanism V2.svg
Blanc reaction mechanism 1.svg
Blanc reaction mechanism 2.svg
Cope reaction mechanism.svg
Cope reaction mechanism v1.svg
Cannizzaro reaction mechanism v1.svg
Pfitzinger Reaction Mechanism V.1.svg
Weiss reaction mechanism, Michael addition-Seite001.svg
Finkelstein reaction mechanism V1-Seite001.svg
Eglinton reaction mechanism V6-Seite001.svg
Aryne formation mechanism.svg
Bamford-Stevens reaction mechanism.svg
Corey-Fuchs reaction mechanism 2v2.svg
Corey-Winter reaction mechanism.svg
Corey-Fuchs reaction mechanism 2v1.svg
Corey-Fuchs reaction mechanism 1v1.svg
Von Richter reaction mechanism.svg
Baylis-Hillman reaction mechanism.svg
Bergman cycloaromatization reaction mechanism.svg
Corey-Seebach reaction mechanism.svg
Corey-Seebach reaction mechanism v1.svg
Bamford-Stevens reaction mechanism v1.svg
Bergman cycloaromatization reaction mechanism v2.svg
Haller-Bauer reaction mechanism V2-Seite001.svg
Algar-Flynn-Oyamada reaction mechanism.svg
Bromoacetamidation mechanism.svg
Barton reaction.svg
Iodoacetamide mechanism.svg
Krapcho reaction.svg
Iodoacetic acid mechanism.svg
Mannichreactionmech1.svg
Mannichreactionmech2.svg
Mannichreactionmech3.svg
Fries rearrangement.svg
MukaiyamaAldolAdditionMechanism.svg
E1cB.svg
Seleniumdioxide oxidation.svg
Selenoxide elimination.svg
Lipid peroxidation.svg
Fries rearrangement (photo).svg
Skraup quinoline synthesis mechanism.svg
Edman degradation (German).svg
Benzoin condensation scheme.svg
E1cb-mechanism.svg
E2-mechanism.svg
Glycolonitrile polymerisation.svg
Transamination mechanism (zh-cn).svg
Arbusow1-Neu.svg
Baeyer-Villiger oxidation mechanism.svg
Perkin Reaktionsmechanismus 1.svg
Perkow Reaktionsmechanismus 1.svg
Passerini Reaktionsmechanismus 2.svg
Pechmann Reaktionsmechanismus 1.svg
Nierenstein Reaktionsmechanismus-1.svg
Polonovski Reaktionsmechanismus 2.svg
Spaac mech.svg
Ritter-Reaktion V.3.svg
Becker Reaction.svg
Lipid peroxidation-es.svg
SilylEnolEtherSynthesisMechanism.svg
SilylEnolEtherSynthesisMechanism2.svg
E1-mechanism.svg
Beckmann rearrangement mechanism.svg
Etard rxn.svg
ACAC mechanism (zh-cn).svg
Mechanismus der SN2- Reaktion V.3.svg
Prevost Reaktionsmechanismus 1.svg
LawessonReagentMechanism.svg
Mesitoic acid AAC1 reaction.svg
FMH2-Bioluninescence.svg
BNR rxn nitrilium mechanism.svg
Williamson-ether-synthesis-2D-2.svg
Lipid peroxidation (zh-cn).svg
SN1 reaction mechanism1.svg
Williamson-ether-synthesis-2D.svg
Corey-Winter olefination mechanism v1.svg
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