Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.
Rapamycin, also known as sirolimus is a macrolide compound that has immunosuppressant functions and prevents transplant rejection through the inhibition of  the protein complex mTORC1.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 5y0m, white background
A ball and stick + ribbons model of beta-secretase - a protein that is important in forming healthy peripheral nerve cells, but is also involved in the onset of Alzheimer's disease.
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
Molecular Model of Infliximab, or Remicade, a monoclonal antibody against tumour necrosis factor alpha (TNF-α), which is used to treat autoimmune diseases
Aromatase (estrogen synthase) enzyme. Protein responsible for the key step in the synthesis of estrogens. 3D illustration. Cartoon representation.
Immunoglobulin G (IgG) - 3d rendered image. Microbiology illustration  the structure of an antibody. The Y-shaped structure. IgG is the most common type of antibody.
The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.
3d Golgi apparatus
3D cartoon and Gaussian surface models. PDB 3kqg, chain id color scheme, white background.
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.
Avibactam is a diazobicyclooctane inhibitor of gram-negative and gram-positive bacteria.  Avibactam (red) inhibits the bacterial enzyme beta-lactamase (blue) of Clostridioides difficile.
Molecular Model of Human Insulin with disulfide bonds shown.
Indoleamine 2,3 dioxygenase 1 (IDO1) protein. Tryptophan catabolic enzyme of the kynurenine pathway. 3D illustration.
Chemical science background
Beta-alanine or β-Alanine molecule. It is naturally occurring beta amino acid. Molecular model. 3D rendering. Illustration
3d structure of l-glucose molecule.
3D cartoon and Gaussian surface models, PDB 3hg3, white background
A ball and stick + ribbons model of HIV protease - an enzyme that is the target of much AIDS and HIV research.
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.
Molecular Model of Human Insulin with disulfide bonds shown.
Bovine beta-lactoglobulin protein, 3D structure. Major whey protein, present in cow milk. Important food allergen.
Human had writing word endorphins and chemical formula. Endorphins are among the brain chemicals known as neurotransmitters, which function to transmit electrical signals within the nervous system
A 3D rendering of a SpyTag-SpyCatcher conjugate, the molecular interaction between these biomolecules. This is used in various biotechnological applications for protein labeling and purification.
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
3D cartoon and Gaussian surface models, chain id color scheme, PDB 4ci9, white background
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.
Aztreonam (left, orange) inhibits the beta-lactamase from Acinetobacter species. Avibactam (red) inhibits the beta-lactamase (blue) of Clostridioides difficile.
DNA A-T Pair
Free Images: "bestof:PDB 1g8e EBI.jpg All alpha proteins Flagellar transcriptional activator FlhD Flagellar transcriptional activator FlhD Flagellar transcriptional activator FlhD"
PDB 1g8e EBI.jpg
PDB 2avu EBI.jpg
PDB 1zy2 EBI.jpg
PDB 1yak EBI.jpg
PDB 1tyh EBI.jpg
PDB 1ny5 EBI.jpg
PDB 1to9 EBI.jpg
PDB 1yaf EBI.jpg
PDB 1bl0 EBI.jpg
PDB 1d5y EBI.jpg
PDB 1rtw EBI.jpg
PDB 2iu5 EBI.png
PDB 1ny6 EBI.jpg
PDB 1ny9 EBI.jpg
PDB 2alc EBI.jpg
PDB 3alc EBI.jpg
PDB 1f4s EBI.jpg
PDB 1f5e EBI.jpg
PDB 1rfy EBI.jpg
PDB 1us6 EBI.jpg
PDB 1upg EBI.jpg
PDB 1avo EBI.jpg
PDB 1unl EBI.jpg
PDB 1ung EBI.jpg
PDB 1unh EBI.jpg
PDB 1h4l EBI.jpg
PDB 1a7c EBI.jpg
PDB 1c5g EBI.jpg
PDB 1dvn EBI.jpg
PDB 1dvm EBI.jpg
PDB 1db2 EBI.jpg
PDB 1b3k EBI.jpg
PDB 1jrr EBI.jpg
PDB 1x41 EBI.jpg
PDB 1orj EBI.jpg
PDB 1ory EBI.jpg
PDB 1vh6 EBI.jpg
PDB 2cpg EBI.jpg
PDB 1b01 EBI.jpg
PDB 1ea4 EBI.jpg
PDB 1irq EBI.jpg
PDB 2bnw EBI.jpg
PDB 2bnz EBI.jpg
PDB 2cax EBI.jpg
PDB 1sxe EBI.jpg
PDB 1udd EBI.jpg
PDB 1z72 EBI.jpg
PDB 1pcf EBI.jpg
PDB 2c62 EBI.jpg
PDB 2phe EBI.jpg
PDB 1l3a EBI.jpg
PDB 2it9 EBI.jpg
PDB 2nvn EBI.jpg
PDB 2gia EBI.jpg
PDB 2gid EBI.jpg
PDB 2gje EBI.jpg
PDB 3c8g EBI.png
PDB 1lj5 EBI.jpg
PDB 1oc0 EBI.jpg
PDB 9pai EBI.jpg
PDB 1by7 EBI.jpg
PDB 1g2h EBI.jpg
PDB 1vi0 EBI.jpg
PDB 2fq4 EBI.jpg
PDB 1v7b EBI.jpg
PDB 1z0x EBI.jpg
PDB 2fd5 EBI.jpg
PDB 2np5 EBI.jpg
PDB 1zk8 EBI.jpg
PDB 2gfn EBI.jpg
PDB 2fbq EBI.jpg
PDB 1z77 EBI.jpg
PDB 1zkg EBI.jpg
PDB 2aqe EBI.jpg
PDB 2aqf EBI.jpg
PDB 2cuj EBI.jpg
PDB 2dt5 EBI.jpg
PDB 1xcb EBI.jpg
PDB 1ri7 EBI.jpg
PDB 1r1t EBI.jpg
PDB 1r23 EBI.jpg
PDB 1smt EBI.jpg
PDB 1r22 EBI.jpg
PDB 1r1u EBI.jpg
PDB 1r1v EBI.jpg
PDB 1y0u EBI.jpg
PDB 1u2w EBI.jpg
PDB 1mkm EBI.jpg
PDB 1jgs EBI.jpg
PDB 1lnw EBI.jpg
PDB 1lj9 EBI.jpg
PDB 1hsj EBI.jpg
PDB 1p4x EBI.jpg
PDB 2frh EBI.jpg
PDB 2fnp EBI.jpg
PDB 1fzp EBI.jpg
PDB 1s3j EBI.jpg
PDB 1ub9 EBI.jpg
PDB 2eth EBI.jpg
PDB 2hr3 EBI.jpg
Terms of Use   Search of the Day