Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
A ball and stick + ribbons model of human Interleukin 2 or IL-2. Interleukin is a hormone which acts as a signalling molecule for the immune system.
3D cartoon and Gaussian surface models, PDB 6vg8, white background
c-Myc and Max transcription factors bound to DNA. 3D illustration. Atoms shown as spheres with conventional color coding.
DNA A-T Pair
Avibactam is a diazobicyclooctane inhibitor of gram-negative and gram-positive bacteria.  Avibactam (red) inhibits the bacterial enzyme beta-lactamase (blue) of Clostridioides difficile.
Rendered coronavirus/2019-nCoV single-stranded RNA, built from experimentally determined Ebola virus crystal structure. Color symbols - bluewhite=carbon, pink=oxygen, lightblue=nitrogen, white=hydrogen, lavender=phosphorus
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
Transfer RNA (abbreviated tRNA and formerly referred to as sRNA, for soluble RNA with RNA strand in the cell 3d rendering
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.
3D cartoon and Gaussian surface models. PDB 2aai, white background.
Glucose-6-phosphate dehydrogenase (G6PD) protein. Enzyme of the pentose phosphate pathway that generates co-enzyme NADPH. 3D illustration.
Model of protein alpha helices forming an ion channel.
PETase (left) degrades  polyethylene terephtalate (PET) into monohydroxyethyl terephthalate (MHET) and MHETase degrades MHET ethylene glycol (EG) and terephthalic acid (TPA). The substrates in the binding sites are depicted in red.
The structure of the protein molecule, tumor marker glioblastoma. X-ray crystalline model of the protein encoded by the MELK gene. 3D rendering.
3D CG rendered image of scientifically accurate Enterobacteria Bacteriophage phiX174 Capsid Structure based on PDB : 1CD3 (capsomere)
Isolated Proteasome with protein conjugated with ubiquitin 3d rendering
A ball and stick + ribbons model of HIV protease - an enzyme that is the target of much AIDS and HIV research.
3D cartoon model, secondary structure color scheme, PDB 2rfn, white background
Indoleamine 2,3 dioxygenase 1 (IDO1) protein. Tryptophan catabolic enzyme of the kynurenine pathway. 3D illustration.
\
PKM2 plays key roles in reprogramming cancer cells from energy production to growth (Warburg Effect). The dimeric form of the enzyme is not only less active in glycolysis but can also move into the nucleus to promote the transcription of other cancer-causing genes. A substrate analogon (red) is bound to the active site. PKM2 is a target for anti-cancer therapies. PDB entry: 6WP3.
DNA polymerase I. An enzyme that participates in the DNA replication. Shown with a fragment of the DNA
Fibroin is an insoluble protein present in silk created by spiders. 3d illustration
Taq polymerase PCR enzyme: a heat-stable DNA polymerase protein that is the key component that makes the polymerase chain reaction (PCR) possible, which is essential for DNA cloning and sequencing
A space-filling molecular model of collagen, a fibrous protein that provides structural support in animals. It has a distinctive triple helix structure. Isolated on black.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 5y0m, white background
Botulinum toxin neurotoxic protein, 3D rendering. Produced by Clostridium botulinum. Cosmetically used to treat wrinkles.
Molecular model of Thymine, 1 of 4 nucleobases to form DNA
A GTP-bound G-alpha protein (blue) binds to and activates the enzyme adenylyl cyclase, which produces then cyclic AMP spreading a signal through the cell.
Nucleosome core particle 3D molecular structure
Free Images: "bestof:PDB 1xsr EBI.jpg All beta proteins Double-stranded beta-helix RmlC-like cupins Ureidoglycolate hydrolase AllA Ureidoglycolate hydrolase AllA EBI License 1xsr"
PDB 1xsr EBI.jpg
PDB 1xsq EBI.jpg
PDB 2bdr EBI.jpg
PDB 1yqc EBI.jpg
PDB 1dzr EBI.jpg
PDB 1dzt EBI.jpg
PDB 1ep0 EBI.jpg
PDB 1epz EBI.jpg
PDB 1nxm EBI.jpg
PDB 2ixl EBI.jpg
PDB 1nyw EBI.jpg
PDB 1nzc EBI.jpg
PDB 2ixc EBI.jpg
PDB 1upi EBI.jpg
PDB 1pm7 EBI.jpg
PDB 2ixh EBI.jpg
PDB 2ixj EBI.jpg
PDB 1rtv EBI.jpg
PDB 1wlt EBI.jpg
PDB 1oi6 EBI.jpg
PDB 1ofn EBI.jpg
PDB 2c0z EBI.jpg
PDB 1x82 EBI.jpg
PDB 1x7n EBI.jpg
PDB 1qxr EBI.jpg
PDB 1qxj EBI.jpg
PDB 1qy4 EBI.jpg
PDB 1x8e EBI.jpg
PDB 2gc0 EBI.jpg
PDB 2gc1 EBI.jpg
PDB 2gc3 EBI.jpg
PDB 1j3q EBI.jpg
PDB 2gc2 EBI.jpg
PDB 1j3p EBI.jpg
PDB 1j3r EBI.jpg
PDB 1o5u EBI.jpg
PDB 1lkn EBI.jpg
PDB 1o4t EBI.jpg
PDB 1v70 EBI.jpg
PDB 2dct EBI.jpg
PDB 2f4p EBI.jpg
PDB 1yhf EBI.jpg
PDB 1vj2 EBI.jpg
PDB 2et1 EBI.jpg
PDB 1fi2 EBI.jpg
PDB 2et7 EBI.jpg
PDB 2ete EBI.jpg
PDB 1lrh EBI.jpg
PDB 1lr5 EBI.jpg
PDB 2phl EBI.jpg
PDB 1dgw EBI.jpg
PDB 2cau EBI.jpg
PDB 2cav EBI.jpg
PDB 1dgr EBI.jpg
PDB 1cau EBI.jpg
PDB 1cax EBI.jpg
PDB 1cav EBI.jpg
PDB 1caw EBI.jpg
PDB 1fxz EBI.jpg
PDB 1ucx EBI.jpg
PDB 1ud1 EBI.jpg
PDB 1uij EBI.jpg
PDB 1ipj EBI.jpg
PDB 1ipk EBI.jpg
PDB 1od5 EBI.jpg
PDB 1uik EBI.jpg
PDB 1j58 EBI.jpg
PDB 1uw8 EBI.jpg
PDB 1l3j EBI.jpg
PDB 1rc6 EBI.jpg
PDB 1sq4 EBI.jpg
PDB 1sef EBI.jpg
PDB 1sfn EBI.jpg
PDB 1j1l EBI.jpg
PDB 1tq5 EBI.jpg
PDB 1juh EBI.jpg
PDB 1gqg EBI.jpg
PDB 1h1i EBI.jpg
PDB 1h1m EBI.jpg
PDB 1gqh EBI.jpg
PDB 1y3t EBI.jpg
PDB 1pmi EBI.jpg
PDB 1qwr EBI.jpg
PDB 1zx5 EBI.jpg
PDB 1eyb EBI.jpg
PDB 1ey2 EBI.jpg
PDB 1zrr EBI.jpg
PDB 1vr3 EBI.jpg
PDB 1xru EBI.jpg
PDB 1x8m EBI.jpg
PDB 1ywk EBI.jpg
PDB 1xe7 EBI.jpg
PDB 1xe8 EBI.jpg
PDB 1znp EBI.jpg
PDB 1yud EBI.jpg
PDB 1yll EBI.jpg
PDB 2b8m EBI.jpg
PDB 2b5h EBI.jpg
PDB 2gh2 EBI.jpg
PDB 2atf EBI.jpg
Terms of Use   Search of the Day