Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
A ribbons model of Human Growth Hormone, also known as Somatotropin, with a translucent surface model.
3D cartoon and Gaussian surface models. PDB 2aai, white background.
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
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.
The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.
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. Hologram view. SEM.
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.
Freshness capsule
Gamma secretase protein complex. Multi-subunit intramembrane protease that plays role in processing of proteins. 3D illustration.
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.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 5y0m, white background
Molecular Model of Human Insulin with disulfide bonds shown.
protein G−DNA conjugate an antibody to the intended area on the surface of bioassay chips or particles; 3d rendering
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. Hologram view. SEM.
Recombinant human insulin. 3d cartoon model based on protein data bank
Aztreonam (left, orange) inhibits the beta-lactamase from Acinetobacter species. Avibactam (red) inhibits the beta-lactamase (blue) of Clostridioides difficile.
3D model of a protein molecule. The spatial oriented structure of the macromolecule.
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, chain id color scheme, PDB 7t3a, white background
Molecular Model of Human Insulin with disulfide bonds shown.
Aromatase (estrogen synthase) enzyme. Protein responsible for the key step in the synthesis of estrogens. 3D illustration. Cartoon representation.
Endosomes - 3d rendered image of Endosomes are membrane-bound organelles. They are parts of endocytic membrane transport pathway.  Endomembrane system in cells. Bilayer Lipid Membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.
Isolated Proteasome with protein conjugated with ubiquitin 3d rendering
Avibactam is a diazobicyclooctane inhibitor of gram-negative and gram-positive bacteria.  Avibactam (red) inhibits the bacterial enzyme beta-lactamase (blue) of Clostridioides difficile.
Brain-derived neurotrophic factor (3d), also known as BDNF, a protein that supports the survival of existing neurons, and encourages the growth and differentiation of new neurons and synapses.
A ribbons model of an antibody, also known as immunoglobin. The immune system produces antibodies (using white blood cells) which then identify and attack viruses and bacteria.
3D cartoon and Gaussian surface models, PDB 3hg3, white background
Molecular Model of Infliximab, or Remicade, a monoclonal antibody against tumour necrosis factor alpha (TNF-α), which is used to treat autoimmune diseases
Interleukin 13 (IL-13) cytokine protein. 3D illustration. Cartoon representation combined with semi-transparent surfaces.
3D rendering. The structure of the protein molecule, an activator of angiogenesis. X-ray crystalline model of one of the subunits of the hif1A molecule.
Free Images: "bestof:PDB 3dwk EBI.png Alpha and beta proteins a+b Lysozyme-like Lysozyme-like PBP transglycosylase domain-like Penicillin-binding protein 2 PBP2 Multi-domain"
2ph1 pdb gallery nucleotide binding-protein-2 (MinD homolog).svg
PDB 3dwk EBI.png
PDB 2olu EBI.png
PDB 2olv EBI.png
PDB 2oqo EBI.png
PDB 3d3h EBI.png
PDB 2z2m EBI.png
PDB 2zc3 EBI.png
PDB 2zc4 EBI.png
PDB 2z2l EBI.png
PDB 1qus EBI.jpg
PDB 1ltm EBI.jpg
PDB 1d0l EBI.jpg
PDB 1d0k EBI.jpg
PDB 1qdt EBI.jpg
PDB 1qdr EBI.jpg
PDB 1d0m EBI.jpg
PDB 1qut EBI.jpg
PDB 1qme EBI.jpg
PDB 1pyy EBI.jpg
PDB 1qmf EBI.jpg
PDB 1rp5 EBI.jpg
PDB 1k25 EBI.jpg
PDB 2ikb EBI.png
PDB 2is5 EBI.png
PDB 2igs EBI.png
PDB 1w5d EBI.jpg
PDB 2j9p EBI.png
PDB 1vqq EBI.jpg
PDB 1mws EBI.jpg
PDB 1mwt EBI.jpg
PDB 1mwu EBI.jpg
PDB 1mwr EBI.jpg
PDB 2c5w EBI.jpg
PDB 2c6w EBI.jpg
PDB 2bg1 EBI.jpg
PDB 2fff EBI.jpg
PDB 2uwx EBI.jpg
PDB 1jmu EBI.jpg
PDB 1z6f EBI.jpg
PDB 1nzo EBI.jpg
PDB 1nj4 EBI.jpg
PDB 1nzu EBI.jpg
PDB 1hd8 EBI.jpg
PDB 1sdn EBI.jpg
PDB 1tvf EBI.jpg
PDB 1xp4 EBI.jpg
PDB 3bec EBI.png
PDB 3beb EBI.png
PDB 1vsp EBI.png
PDB 2v47 EBI.png
PDB 113l EBI.jpg
PDB 1cns EBI.jpg
PDB 2baa EBI.jpg
PDB 1dxj EBI.jpg
PDB 3lzt EBI.jpg
PDB 4lzt EBI.jpg
PDB 193l EBI.jpg
PDB 194l EBI.jpg
PDB 1lzb EBI.jpg
PDB 1lza EBI.jpg
PDB 1hel EBI.jpg
PDB 1h6m EBI.jpg
PDB 1rfp EBI.jpg
PDB 1lzc EBI.jpg
PDB 2lzt EBI.jpg
PDB 1lys EBI.jpg
PDB 1lsc EBI.jpg
PDB 1lse EBI.jpg
PDB 1lma EBI.jpg
PDB 1lsd EBI.jpg
PDB 1lsb EBI.jpg
PDB 1lsf EBI.jpg
PDB 1lsa EBI.jpg
PDB 132l EBI.jpg
PDB 5lym EBI.jpg
PDB 1rcm EBI.jpg
PDB 3lym EBI.jpg
PDB 6lyt EBI.jpg
PDB 2lym EBI.jpg
PDB 1hew EBI.jpg
PDB 1uco EBI.jpg
PDB 4lyt EBI.jpg
PDB 5lyt EBI.jpg
PDB 4lym EBI.jpg
PDB 3lyt EBI.jpg
PDB 2lyz EBI.jpg
PDB 6lyz EBI.jpg
PDB 3lyz EBI.jpg
PDB 1lzt EBI.jpg
PDB 4lyz EBI.jpg
PDB 5lyz EBI.jpg
PDB 1iee EBI.jpg
PDB 1lks EBI.jpg
PDB 1v7s EBI.jpg
PDB 1v7t EBI.jpg
PDB 2d4j EBI.jpg
PDB 2d4k EBI.jpg
PDB 1wtn EBI.jpg
PDB 2d4i EBI.jpg
Terms of Use   Search of the Day