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.
The glucagon like peptide-1 receptor (GLPr) is a G proteincoupled receptor (GPCR) that mediates the action of GLP-1, a peptide hormone. The activated receptor  has a strong effect  on the management of type 2 diabetes mellitus and obesity, including glucose homeostasis and regulation of gastric motility and food intake.
3D cartoon and Gaussian surface models. PDB 2aai, white background.
Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.
Alpha-tubulin 3C, a protein associated with the genetic diseases Clouston hidrotic ectodermal dysplasia and Kabuki syndrome. 3d rendering.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
3d rendered Gastric inhibitory polypeptide (GIP, glucose-dependent insulinotropic peptide) endocrine protein hormone, 3D illustration
ATP Synthase Protein - 3d rendered image. Medical microbiology concept.  Structure and conformational states of the bovine mitochondrial ATP (Adenosine triphosphate) synthase. Chemical energy is synthesized in eukaryotic cells primarily. Hydrolase. Hologram view. HUD, FUI
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.
HER2 (light blue)  locked in the inactive conformation by Trastuzumab (left) and Pertuzumab. Trastuzumab has drastically improved the prognosis of HER2-positive breast cancer patients.
Ferritin is a protein that contains iron and is the primary form of iron stored inside of cells. 3D cartoon model, PDB 4y08, white background
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.
3D model of a protein molecule. The spatial oriented structure of the macromolecule.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy
Recombinant human insulin. 3d cartoon model based on protein data bank
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.
3d render of the epidermal growth factor (EGF) receptor
Rat tailed maggot photographed in a studio
The Raf/MEK/ERK (MAPK) propagates growth signals in the cell. Misregulation can lead to cancer.\nThe red dots on the active EGFR are phosphorylated tyrosines. PDB entries: 1egf, 1nql, 1m17, 2jwa, 3njp, 2gs6, 1gri, 1xd2, 3ksy, 5p21, 6xi7, 6q0j, 2y4i,
Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.
Resistin also known as adipose tissue-specific secretory factor (ADSF) or C/EBP-epsilon-regulated myeloid-specific secreted cysteine-rich protein (XCP1) is a cysteine-rich peptide hormone derived from adipose tissue that in humans is encoded by the RETN gene. 3D cartoon and Gaussian surface models, chain id color scheme, based on PDB 1rfx, white background
A ball-and-stick plus ribbons 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.
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
AI will enable advances in genetic modification technology to treat intractable diseases.
Frataxin (human) mitochondrial protein. Reduced expression causes Friedreich's ataxia. 3D illustration. Cartoon & wireframe 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.
From left to right: the NMDA and  AMPA receptors transport calcium cations into neurons after being activated by the neurotransmitter glutamate and  the GABA receptor (right) transport chloride anions after the activation by gamma aminobutyrate. PDB entries: 6wht,  3kg2, 6d6u
Different germs in the human intestines called microbiome,Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria
The GABAA receptor is an ionotropic receptor and ligand-gated ion channel. Its endogenous ligand is γ-aminobutyric acid, the major inhibitory neurotransmitter in the central nervous system. 3D cartoon model with reduced opacity, white background.
Dengue virus cell. 3D Render
Free Images: "bestof:PDB 1fep EBI.jpg Membrane and cell surface proteins and peptides Transmembrane beta-barrels Porins Ligand-gated protein channel Ferric enterobactin receptor"
Lipid raft organisation scheme.svg
Human genome by functions.svg
Insulin glucose metabolism ZP.svg
Insulin glucose metabolism ZP-ca.svg
CD8 receptor.svg
Cell membrane detailed diagram blank.svg
Hepatitis B virus v2.svg
Cellular tight junction keys.svg
PDB 1fep EBI.jpg
PDB 1by5 EBI.jpg
PDB 1by3 EBI.jpg
PDB 2fcp EBI.jpg
PDB 1qfg EBI.jpg
PDB 1qff EBI.jpg
PDB 1fcp EBI.jpg
PDB 1fi1 EBI.jpg
PDB 1qjq EBI.jpg
PDB 1qkc EBI.jpg
PDB 2grx EBI.jpg
PDB 1kmo EBI.jpg
PDB 1po0 EBI.jpg
PDB 1pnz EBI.jpg
PDB 1kmp EBI.jpg
PDB 1po3 EBI.jpg
PDB 2guf EBI.jpg
PDB 1nqe EBI.jpg
PDB 2gsk EBI.jpg
PDB 1nqf EBI.jpg
PDB 1nqg EBI.jpg
PDB 1nqh EBI.jpg
PDB 1af6 EBI.jpg
PDB 1mpm EBI.jpg
PDB 1mpq EBI.jpg
PDB 1mpo EBI.jpg
PDB 1mal EBI.jpg
PDB 1mpn EBI.jpg
PDB 2mpr EBI.jpg
PDB 1mpr EBI.jpg
PDB 1t16 EBI.jpg
PDB 1t1l EBI.jpg
PDB 1tly EBI.jpg
PDB 1tlw EBI.jpg
PDB 1tlz EBI.jpg
PDB 1oed EBI.jpg
PDB 1hxx EBI.jpg
PDB 2omf EBI.jpg
PDB 1gfp EBI.jpg
PDB 1gfq EBI.jpg
PDB 1hxt EBI.jpg
PDB 1mpf EBI.jpg
PDB 1gfo EBI.jpg
PDB 1gfn EBI.jpg
PDB 1hxu EBI.jpg
PDB 1gfm EBI.jpg
PDB 1bt9 EBI.jpg
PDB 1opf EBI.jpg
PDB 1pho EBI.jpg
PDB 2por EBI.jpg
PDB 3por EBI.jpg
PDB 3prn EBI.jpg
PDB 1prn EBI.jpg
PDB 5prn EBI.jpg
PDB 6prn EBI.jpg
PDB 2prn EBI.jpg
PDB 1bh3 EBI.jpg
PDB 8prn EBI.jpg
PDB 7prn EBI.jpg
PDB 1h6s EBI.jpg
PDB 1osm EBI.jpg
PDB 2fgq EBI.jpg
PDB 2fgr EBI.jpg
PDB 1e54 EBI.jpg
PDB 1a0t EBI.jpg
PDB 1oh2 EBI.jpg
PDB 1a0s EBI.jpg
PDB 1qjp EBI.jpg
PDB 1bxw EBI.jpg
PDB 1g90 EBI.jpg
PDB 2ge4 EBI.jpg
PDB 1qj8 EBI.jpg
PDB 1qj9 EBI.jpg
PDB 1q9f EBI.jpg
PDB 1orm EBI.jpg
PDB 1q9g EBI.jpg
PDB 1p4t EBI.jpg
PDB 2oau EBI.jpg
PDB 2vv5 EBI.png
PDB 1thq EBI.jpg
PDB 1mm5 EBI.jpg
PDB 1mm4 EBI.jpg
PDB 1ys5 EBI.jpg
PDB 1i78 EBI.jpg
PDB 1k24 EBI.jpg
PDB 1uyn EBI.jpg
PDB 1uyo EBI.jpg
PDB 1qd6 EBI.jpg
PDB 1qd5 EBI.jpg
PDB 1ilz EBI.jpg
PDB 1fw2 EBI.jpg
PDB 1ild EBI.jpg
Terms of Use   Search of the Day