Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
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
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 cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy
Cell osmosis, cell in isotonic solution, cell in hypertonic solution, cell in hypotonic solution, exchange of fluxes
Orange colored ball standing on the twisted wavy purple colored ribbon with blocks. (3d render)
Gene therapy in a transparent soft gelatin capsule on a cell membrane, future treatment (3D Rendering)
Viral Infection Monkeypox Virus - 3d rendered image. Abstract biomedical illustration. \nAntibody, Antigen, Vaccine technology concept.
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.
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.
Brain-derived neurotrophic factor and Neurotrophin-4, NT-3 are neurotrophic factors in the NGF (Nerve Growth Factor) family of neurotrophins. 3D cartoon and Gaussian surface models with differently colored chains, white background.
RNA molecule,Epigenetics concept.
Lung cancer, also known as lung carcinoma, is a malignant lung tumor characterized by uncontrolled cell growth in tissues of the lung.
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.
Isolated cholesterol molecule between phospholipid molecules membrane 3d rendering
Ring-shaped RNA molecules (or single-strand DNA, cDNA), in glossy reflection with different pattern of every sphere
G-protein-coupled receptors (GPCRs) have central roles in intercellular communication. From left to right, Rhodopsin activated by light, T-cell receptor activated by MHC and antigen (green), dopamine receptor activated by dopamine (red), GABA B receptor activated by the agonist baclofen. G alpha proteins (light blue) activate the phosphodiesterase 6 (left), which degrades cGMP, and  adenylyl cyclase (right), which produces cAMP.  cAMP activates the protein kinase C. Source: PDB entries 6oy9, 7aue, 1jl4,  1fyt,  7eb2, 6r3q, 3tnp, 7jsn
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.
3D cartoon and Gaussian surface models. PDB 3kqg, chain id color scheme, white background.
Photomicrograph of one celled amoeba. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. It is important in the normal functioning of the nervous system via its role in the synthesis of myelin, and in the circulatory system in the maturation of red blood cells in the bone marrow. Plants do not need cobalamin and carry out the reactions with enzymes that are not dependent on it.
Evolution of nanotechnology and self-proliferation of therapeutic agents
Life cycle of filamentous bacteriophage M13 in phospholipid bilayers 3d rendering
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.
Mitochondria are important organelles in the cell. It is directly involved in our drive to live. ATP production by mitochondria is the source of energy.\nAnd even if you are not familiar with biology, mitochondria are widely known and are a persistent image of cells and cell biology.\nIt is no exaggeration to say that it is the concept of the existence of the details of the living body.\nThis image was not created by AI.
3D cartoon model with the interacting residues labeled, PDB 2aot, black background.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
C-fos-induced growth factor, a vascular endothelial growth factor. The protein encoded by this gene is a member of the PDGF/VEGF family. 3d rendering.
In vitro bacterial culture
Free Images: "bestof:Mecanism of action for Lysozyme.svg en Hydrolysis β-1 4-glycosaminidasic of petidoglycan main constituant of some bacteria's cell menbrans Cleavage is done"
Mecanism of action for Lysozyme.svg
Flagellum base diagram en.svg
Flagellum base diagram-fr.svg
Phylogenetic_tree-fr.svg
生命系统发生树.svg
portugues-sexo_alemão-sex_ingles-sex_africano-seks_russo-секс_albanes-sex_chines-性別_bulgaro-секс_croata-spol_gales-rhyw_coreano-섹스_frances-sexe_japones-セックス_filandes-sukupuolesta_arabe-الجنس_prontos_ai_tens_em_15_linguas_a_p.jpg
portugues-sexo_alemão-sex_ingles-sex_africano-seks_russo-секс_albanes-sex_chines-性別_bulgaro-секс_croata-spol_gales-rhyw_coreano-섹스_frances-sexe_japones-セックス_filandes-sukupuolesta_arabe-الجنس_prontos_ai_tens_em_15_linguas_a_p.jpg
portugues-sexo_alemão-sex_ingles-sex_africano-seks_russo-секс_albanes-sex_chines-性別_bulgaro-секс_croata-spol_gales-rhyw_coreano-섹스_frances-sexe_japones-セックス_filandes-sukupuolesta_arabe-الجنس_prontos_ai_tens_em_15_linguas_a_p.jpg
Terms of Use   Search of the Day