Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
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 Human Insulin. Isolated on black.
3d rendering of ubiquitin is attached to target proteins by a process called ubiquitination
3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen
3D cartoon and Gaussian surface models, PDB 6gu2, white background
Photomicrograph of flatworm,
Molecule with biology and chemical concept, 3d rendering. Digital drawing.
3D rendering of microscopic molecular structure
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.
Myxoid liposarcoma.  Myxoid/round cell liposarcoma, or MRCLS, is one of several types of liposarcoma. Liposarcoma is a rare cancer that grows in the cells that store fat in the body. MRCLS usually grows in the arms and legs. These tumors grow slowly, and they can spread to other parts of the body
Algae, a unicellular organism
plant Stem Sclerenchvma C.S. under light mircoscope with white background
3D cartoon and Gaussian surface models, PDB 2vtb, white background.
Close-up shot of a petri dish for checking an antibiotic in the laboratory.
Genital herpes lesions and close-up view of herpes simplex viruses attaching to human cells, 3D illustration
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 NEK-7 independent NLRP3 inflammasome in it's hexameric conformation with ADP (red) bound. Inflammasomes are a promising target for the treatment of autoimmune diseases. PDB entry: 7zgu.
Streptococcus pneumoniae causes acute bacterial infections. Streptococcus pneumonia can be\ndifferentiated from other alpha-hemolytic streptococci\nbased on its susceptibility to optochin ( the disk is visible on the pic).
Monosodium glutamate, MSG or sodium glutamate molecules. MSG is used in cooking as a flavor enhancer with an umami taste 3d rendering
A model of a molecule of arginine, an amino acid. Amino acids are the building blocks of proteins and have many functions in metabolism. In particular, Arginine has an important function in the immune system, wound healing and cell division.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 3hi7, white background
Molecular model of Adenosine triphosphate,  or Adenosine-5'-triphosphate (ATP)
Molecule with water background, 3d rendering. Digital drawing.
Freshness capsule
PETase (left) degrades  polyethylene terephtalate (PET) into monohydroxyethyl terephthalate (MHET) and MHETase degrades MHET ethylene glycol (EG) and terephthalic acid (TPA).
Liver Fluke Section under light microscope with white background
Molecular model of insulin hormone, 3D illustration. It is produced by pancreas and takes part in glucose and lipid metabolism
3D realistically coloured hexagonal shapes of connected spheres, background with copy space. Futuristic illustration design template for scientific presentation. Molecular business, science, teamwork concept.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 3omv, white background
Close-up shot of a petri dish for checking an antibiotic in the laboratory.
Free Images: "bestof:Lactase.png en Chemical reaction catalyzed by the lactase enzyme own Boghog2 File lactose hydrolysis svg Hydrolases reactions Lactase EC 3 2 1"
Lactase2.svg
Lactose hydrolysis.svg
DHFR rxn.svg
Aspartate transaminase reaction.svg
Barium hydroxide-catalyzed 2-carboxy-1,3-dihydroxynaphthalene preparation.svg
BCIP reaction.svg
Glutamate dehydrogenase reaction.svg
PPDK reaction.svg
P450cycle.svg
Acylphosphate rxn.svg
RuBisCO reaction.svg
LTA4H rxn.svg
Barium hydroxide-catalyzed methylsuccinic acid preparation.svg
Amide hydrolysis.svg
Propylene and potassium permanganate.svg
Nitril Hydrolysis V.1.svg
Amide Hydrolysis V.1.svg
Weiss 1,2Aldol V.2.svg
Conversion, Selectivity and Yield.svg
Cysteinprotease Reaktionsmechanismus.svg
Tischenko Reaction V.1.svg
Tischenko Reaction V.2.svg
Reaction catalyzed by 3-dehydroquinate synthase.svg
Photo-Fries Reaction V.1.svg
Spaac mech.svg
Hydrolysis Solvent Yellow 124.svg
Luciferin bacterial reaction.svg
Reaction Tyrosinase.svg
Alpha oxidation part I.svg
Alpha oxidation part III.svg
Alpha oxidation part II.svg
Alpha oxidation part IV.svg
Simple mechanism.svg
Ether-cleavage-sn1.svg
Ether-cleavage-sn2.svg
Alpha oxidation part V.svg
Addition reaction to ethene.svg
Alkynylation.svg
Phenolate-cyanogenhalide-diphenylcarbonimidate.svg
SPAAC Reaction.svg
Sinay modification.svg
Millon Reaction Principle V.1.svg
KinEnzymo(en).svg
Reaction of 2-Butene with diisopinocampheylborane.svg
Allylic rearrangement reaction.svg
Oxymercuration2.svg
Emerson-Reaktion.svg
Hydroalumination.svg
Evans aldol 7.svg
Mecanism of action for Lysozyme.svg
Murexide reaction.svg
Opianic acid demethylation.svg
CuAAC.svg
Laktoseintoleranz-1.svg
Togni s reagent II reaction 03.svg
Takai1.svg
Bedoukian reaction.svg
6FEWieghardt.svg
Fischer glycosidation.svg
Phosphoglucomutase Mechanism.svg
Anilin aus Phenol.svg
Legame ionico fra sodio e cloro.svg
Barium hydroxide-catalyzed diacetone alcohol preparation.svg
Knoevenagel reaction mechanism 1.svg
Knoevenagel reaction mechanism 2.svg
Knoevenagel reaction mechanism 3.svg
Nitrone hydrolysis.svg
Totarol scheme 3.svg
Totarol scheme 5.svg
Thiazolium.Ilyde.Benzoin.Condensation.Catalysis.svg
ML reaction title.svg
Jensen reaktion.svg
Polyketid1.svg
Diacylperoxide Reaction V.1.svg
Rhodanase2 V.1.svg
Duff Reaction V.1.svg
Anilin aus Nitrobenzol.svg
Zinckesuhl.svg
Ninhydrin reaction.svg
Ethylbenzene-styrene interconversion.svg
Bromination Reaction V.1.svg
Selenoxide elimination.svg
Pedersen crown ether 1.svg
Nerolidol to Farnesol.svg
Totarol scheme 6.svg
Alkylation of amine.svg
Acetanilide syntheses.svg
Equilibrium left.svg
Equilibrium right.svg
Equilibrium rl.svg
Cyclopropanone Reactions V.1.svg
Ring-Opening-Reactions V.1.svg
Gewald Type Reaction V.1.svg
Aldol control 1.svg
NgroupP11.svg
Ethen vinyl acetate copolymer.svg
Phosphaalkene General.svg
Phosphine ester reduction.svg
Phosphine umpolung.svg
Pentacene hexathia synthesis.svg
Terms of Use   Search of the Day