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After dopamine binding, the dopamine receptor changes his shape and binds the inactive G protein.The G protein expels its GDP molecule replacing it by GTP. and falls into two pieces. The Galpha subunit binds to and activates the enzyme adenylyl cyclase, which produces then cyclic AMP spreading a signal through the cell.
plant Zea Stem C.S. under light mircoscope with white background
Host cells with spores (mold) are inside wood under the microscope for education.
graphs and charts  Financial data analyzing
3D cartoon and molecular surface models, chain id color scheme, putative membrane shown, pdb 1l7v, white background
A simple dark background with cubes, blockchain representation
Aerial view of loyster farm by Ardara, County Donegal - Ireland.
Social Media, Account, USA, Connect
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.
plant rape flower cross section under light mircoscope with white background
Skin cells and molecular structure, 3d rendering. Computer digital drawing.
Intricate bubble texture macro in bright colors for abstract background. Liquid bubbles lit from below with colors injected into the liquid as a design or art abstract.
background colored macro bubbles of water
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy
Dicot plants stem show plant vascular tissue under light microscope view for botany education.
stx2a is a subtype of Shiga toxin-producing E. coli (STEC) linked to Hemolytic Uremic Syndrome (HUS), a severe condition impacting kidney function and blood clotting. STEC poses a significant risk of foodborne illness and can spread within communities including family members.
The calcitonin gene related peptide (yellow) binds to its receptor (blue) on neurons and smooth muscle cells of cerebral blood vessels, activating a signal cascade through G-proteins (dark blue) in this cells that  leads to a dilatation of the blood vessels (vasodilatation). Blocking the CGRP receptor diminishes the quantity of migraine attacks.\
New financial services linked to credit cards
Artificial Intelligence: Simplified image of the principles of convolutional neural networks with input, hidden, output layers. It classifies geometric forms - in this case a cube
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.
Solar radiation analysis of a public building. Multipurpose common public space analysis with parametric louvers to control sun exposure and radiation.
Photomicrograph of two rotifers. Rapidly rotating cilia at top of heads, internal organs visible. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
closeup brown cutting mat, equipment in office
Burkitt lymphoma is a form of non-Hodgkin's lymphoma in which cancer starts in immune cells called B-cells. Recognized as a fast growing human tumor, Burkitt lymphoma is associated with impaired immunity and is rapidly fatal if left untreated.
The study of plant tissues under the microscope in the laboratory.
Storyboard and colored pencils on the table. Template design for commercial filming.
GABA B receptors  are G protein-coupled receptors, also called metabotropic receptors.  Binding of  an agonist (here baclofen, red) leads to a G-protein coupled C-AMP signaling pathway. Source: PDB entries 7eb2, 6r3q,.
Liver Fluke Section under light microscope with white background
Vacuolar-type ATPase (V-ATPase) is a highly conserved evolutionarily ancient enzyme with remarkably diverse functions in eukaryotic organisms. V-ATPases acidify a wide array of intracellular organelles and pump protons across the plasma membranes of numerous cell types. 3D cartoon and Gaussian surface models, based on PDB 6wm2, white background.
Abstract Crystal background marble shot, nature pattern.
Free Images: "bestof:Wallpaper group diagram cm.svg Cell structure diagram of the wallpaper group cm generated by self written XSLT available from the category overview created 22"
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(Downbeat, New York, N.Y., ca. 1948) (LOC) (4843742508).jpg
(Portrait of Duke Ellington, William P. Gottlieb's home, Maryland, 1941) (LOC) (4932366128).jpg
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Enfants chèvre Sarazin Louvre R.F.1843 gris.jpg
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(Portrait_of_Cozy_Cole,_New_York,_N.Y.(?),_ca._Sept._1946)_(LOC)_(5269515180).jpg
(Glenn_Miller_Orchestra(?),_New_York,_N.Y.(?),_between_1938_and_1948)_(LOC)_(5306384035).jpg
(Portrait_of_Bud_Freeman,_Eddie_Condon's(?),_New_York,_N.Y.,_between_1946_and_1948)_(LOC)_(5306966898).jpg
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(Portrait_of_Dardanelle,_Joe_Sinacore,_and_Bert_Nazer,_Sheraton_Hotel,_Satire_Room(?),_New_York,_N.Y.,_ca._June_1946)_(LOC)_(5269517304).jpg
Lace_Bark_Beauty.jpg
(Portrait_of_Dardanelle,_Joe_Sinacore,_and_Bert_Nazer,_Sheraton_Hotel,_Satire_Room(?),_New_York,_N.Y.,_ca._June_1946)_(LOC)_(5268905963).jpg
Boston_Massacre_high-res.jpg
(Portrait_of_Walter_Hendl,_Tony_Aless,_Billy_Bauer,_Chubby_Jackson,_Don_Lamond,_Woody_Herman,_and_Flip_Phillips,_Carnegie_Hall(?),_New_York,_N.Y.(?),_ca._Apr._1946)_(LOC)_(4843746780).jpg
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IGFarbenGoetterrat.jpg
Bartholomeus_van_der_Helst,_Banquet_of_the_Amsterdam_Civic_Guard_in_Celebration_of_the_Peace_of_Münster.jpg
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