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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.

Internal structure of the Earth, cutaway 3D illustration. From the centre outwards, the four layers shown in the image are: inner core, outer core, mantle, and crust

plant Pumpkin ovary under light mircoscope with white background

a spring scene with cherry blossoms in bloom

$3D Render of a Topographic Map of Antwerpen, Belgium.\nAll source data is in the public domain.\nContains modified Copernicus Sentinel data (Aug 2019) courtesy of ESA. URL of source image: https://scihub.copernicus.eu/dhus/#/home.\nRelief texture SRTM data courtesy of NASA. URL of source image: https://search.earthdata.nasa.gov/search/granules/collection-details?p=C1000000240-LPDAAC_ECS&q=srtm%201%20arc&ok=srtm%201%20arc$

3D cartoon and Gaussian surface models with a putative membrane shown, PDB 4p02, white background

Close-up of clay brick wall in the ruins of Huaca Pucllana in Lima (Peru)

Abstract background with rock texture in close up

Anguilla flag on a textured background. Conceptual collage.

$Free\nMap:https://visibleearth.nasa.gov/images/57730/the-blue-marble-land-surface-ocean-color-and-sea-ice$

The texture of an old concrete grunge wall showcases weathering, cracks, and a worn appearance, adding character and depth to its surface

3D cartoon and Gaussian surface models, chain id color scheme, PDB 4ah6, white background

plant rape flower cross section under light mircoscope with white background

View of Colosseum in Rome, famous landmark of eternal city, capital of Italy

Golden Zebra print pattern leather cut as background textured and wallpaper. Rustic style

Flag of Fiji. Fiji flag on fabric surface. Fabric texture. National symbol. Country in Oceania. Republic of Fiji. island country symbol

The Colosseum in Rome stands majestically against a bright blue sky with fluffy clouds. The ancient amphitheater is partially visible with a pedestrian sign in the foreground.

High angle closeup view of a small rock-pool with various colourful seaweeds on a rock platform on the beach on the south coast of NSW near Ulladulla

Rear view of the Roman Colosseum because it was under repair.

$Sale\nMap:https://visibleearth.nasa.gov/images/57730/the-blue-marble-land-surface-ocean-color-and-sea-ice$

3D cartoon and Gaussian surface models, PDB 6gu2, white background

Globe Planet Earth And March On White Background”

Representation of a rectangular flat Earth model on white background with shadow. Angle view with perspective 3d render. Elements of this image furnished by NASA.

Conceptual World on white background . NASA world map image layered and used; https://apod.nasa.gov/apod/image/0304/bluemarble2k_big.jpg

Free Images: "bestof:Archaea membrane.svg Archaeal membrane structure Adapted from http //www ucmp berkeley edu/archaea/archaeamm html Up archaeal membrane 1-isoprene sidechain"

Adherens Junctions structural proteins.svg

Endomembrane system diagram en (edit).svg

Animal mitochondrion diagram en (edit).svg

Osmotic pressure on blood cells diagram.svg

Ikaros solar sail key liberation sans.svg

Ikaros solar sail key numbered bottom line.svg

Ikaros solar sail key plain minusthosefivepaths.svg

Ikaros solar sail key plain plusfontstyleaddedtothose5paths.svg

Ikaros solar sail key liberation sans plain.svg

Ikaros solar sail key liberation and dejavu sans.svg

Osmotic pressure on blood cells diagram-sk.svg

Fragment_-_Google_Art_Project_(5492247).jpg

Map of Afghanistan, Districts and Provinces.svg

3,3',5,5'-tetramethyl-(1,1'-biphenyl)-4,4'-diamine 200.svg

Adherens Junctions structural proteins-fr.svg

Auguste_Hippolyte_Collard_-_Pont_du_Point_du_Jour_-_Google_Art_Project.jpg

Leaf_from_the_Morgan_Picture_Bible_-_Google_Art_Project.jpg

Juan_Gris_-_Portrait_of_Pablo_Picasso_-_Google_Art_Project.jpg

Junctional complex and pinocytotic vesicles - embryonic brain-TEM.jpg

Unctional complex and pinocytotic vesicles - embryonic brain - TEM.jpg

Ankyrin R membrane-binding domain 1N11.png

Ankyrin R membrane-binding domain 1N11 surface.png