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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.
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
3D cartoon and molecular surface models, chain id color scheme, putative membrane shown, pdb 1l7v, white background
DNA Helix - 3d rendered image. Genetic research concept. Complex spiral structure illustration. Medical, science, genetic biotechnology, gene cell, chromosome idea. DNA strands on dark background . Science nanotechnology.
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.
DNA mutation, a mutation is a change in a DNA sequence, mutations can result from DNA copying mistakes made during cell division.
Covid-19 Coronavirus Variants Omicron Delta Gamma Beta Alpha Pandemic Virus Disease Mutation
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
Inside protein molecule
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
B-chain pentamer and A-chain subunit (green), 3D cartoon and Gaussian surface model, white background
Close-up shot of a petri dish for checking an antibiotic in the laboratory.
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.
Collagen protein molecule. Molecular model. 3D rendering. Illustration
Fresh vegetables, fruits and seeds on black table, flat lay. Sources of essential amino acids
In vitro bacterial culture
Top view of various kinds of vegan protein sources like tofu, tempeh, soy beans, soy milk, mushrooms, wakame, lentils, peanuts, spinach and chick peas. All the objects are on a gray bluish backdrop. Studio shot taken with Canon EOS 6D Mark II and Canon EF 24-105 mm f/4L
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, chain id color scheme, PDB 7t3a, white background
Hemp Floral Wax in a petri dish
Food containing natural iron. Fe: Liver, avocado, broccoli, spinach, parsley, beans, nuts, on a white background. Top view.
Molecular Model of Human Insulin with disulfide bonds shown.
Hyaluronan, hyaluronic acid, HA, hyaluronate molecule, short fragment. Molecular model. 3D rendering. Illustration
Dna structure digital concept
A quadrant streak of the bacterium Staphylococcus aureus cultured or inoculated on Baird-Parker agar with egg tellurite .
Abstract Lactobacillus Bulgaricus Bacteria - 3d rendered microbiology image. Medical research, health-care concept. SEM (TEM)scanning view. Hologram digital display, HUD, FUI.
3D cartoon and Gaussian surface models, PDB 6p8e, white background
DNA and biotechnology concept
GABA B receptors  are G protein-coupled receptors, also called metabotropic receptors.  Binding of  an agonist (baclofen, red) leads to a G-protein coupled C-AMP signaling pathway. Source: PDB entries 7eb2, 6r3q,.
3D rendered simple solid icon
Free Images: "bestof:PDB 1ecr EBI.jpg Multi-domain proteins alpha and beta Replication terminator protein Tus Replication terminator protein Tus Replication terminator protein Tus"
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PDB 1ecr EBI.jpg
PDB 2ewj EBI.jpg
PDB 2i06 EBI.png
PDB 2i05 EBI.png
PDB 1bm9 EBI.jpg
PDB 1f4k EBI.jpg
PDB 1j0r EBI.jpg
PDB 2dpu EBI.jpg
PDB 2dpd EBI.jpg
PDB 2efw EBI.png
Tus-Ter complex 1ecr.png
PDB 1ksy EBI.jpg
PDB 1ksx EBI.jpg
PDB 1m55 EBI.jpg
PDB 1uut EBI.jpg
PDB 1rz9 EBI.jpg
PDB 1l5i EBI.jpg
PDB 1l2m EBI.jpg
PDB 1f08 EBI.jpg
PDB 1r9w EBI.jpg
PDB 2e9x EBI.png
PDB 2q9q EBI.png
PDB 2eho EBI.png
PDB 2c5r EBI.jpg
PDB 2bnk EBI.jpg
PDB 1zae EBI.jpg
PDB 1rep EBI.jpg
PDB 1hkq EBI.jpg
PDB 2pi2 EBI.png
PDB 2pqa EBI.png
PDB 2z6k EBI.png
PDB 2z9o EBI.png
PDB 2nra EBI.png
PDB 2b3g EBI.jpg
PDB 2b29 EBI.jpg
PDB 1fgu EBI.jpg
PDB 1jmc EBI.jpg
PDB 1l1o EBI.jpg
PDB 1ewi EBI.jpg
PDB 1quq EBI.jpg
PDB 1v1q EBI.jpg
PDB 1txy EBI.jpg
PDB 2ccz EBI.jpg
PDB 1vdd EBI.jpg
PDB 1ad2 EBI.jpg
PDB 1i2a EBI.jpg
PDB 1cjs EBI.jpg
PDB 1u63 EBI.jpg
PDB 1dwu EBI.jpg
PDB 1mzp EBI.jpg
PDB 1su8 EBI.jpg
PDB 1su7 EBI.jpg
PDB 1suf EBI.jpg
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