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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 Illustration, visualization of Neurons firing neurotransmitters in the synaptic gap.
Life cycle of filamentous bacteriophage M13 in phospholipid bilayers 3d rendering
Chemical Formulas Medical Experiment
Cytochrome P450 molecule. CYP 3A4 is the most promiscuous of the human CYP enzymes. Molecular model. 3D rendering. Illustration
Closeup of the synapse transmitting signal along neuron network.
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
Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. They are heterodimers and function as transmembrane linkers between the extracellular matrix and the actin cytoskeleton. A cell can regulate the adhesive activity of its integrins from within.
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.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
3d render of the epidermal growth factor (EGF) receptor
Cloud made of wire and multicolored spheres, retro futuristic style, 3d.
Lipid bilayer cell membrane with membrane and intracellular receptors
3D Rendered Illustration, visualization of Neurons firing neurotransmitters in the synaptic gap.
Gene therapy in a transparent soft gelatin capsule on a cell membrane, future treatment (3D Rendering)
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.
The vascular endothelial growth factor (red) promotes blood vessel formation (angiogenesis). It affects cancer proliferation, wound healing and other physiological processes.  Activation by VEGF leads to the dimerization of the VEGFR monomers. Source: PDB entries, 5t89, 2m59, 3hng.
chromosome,Human genome concept
Illustration of animal cell anatomy
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.
Poly Protein G with Detection Antibodies to enhance Immunoassays sensitivity on the lipid bilayer bacteria outer layer 3d rendering
3d animal cell on black background
3D cartoon and Gaussian surface models with a putative membrane shown, PDB 4p02, white background
Squash preparation of  onion root tip cells stained to reveal chromosomes,  Bright field illumination, light microscopy.  This image was taken with the X40 objective lens.  Depth of focus is extremely low at this magnification.  Smaller apertures give greater depth of focus, but image quality deteriorates and resolution is greatly reduced.  The aperture in this image was optimised for contrast and resolution. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
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.
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.
Glycoprotein bilayer cell membrane cross section and its ion channel (3D Rendering)
X chromosome with degrading or aging telomeres isolated on white background
A1 receptors with G-proteins in cell membrane. Also visible are calcium (Ca) channels. In front A1 receptor an agonist (adenosine or a drug) is just about to bind.
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.
Free Images: "bestof:SchematicP2XRSubunitV2.png en Schematic diagram showin P2X receptor subunit topology own Subcellular Check categories 2009 November 18 en wikipedia"
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