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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.

Close-up shot of a petri dish for checking an antibiotic in the laboratory.

calcite and duftite mineral sample crystals, rare earth minerals

Chemical element symbols for zinc and gallium from the periodic table of the elements. Taken from public domain periodic table from nist.gov. Similar images of other elements are available for viewing in the

Macro natural Cuprian Adamite isolated on dark grey background

Photomicrograph of rotifer. Rapidly rotating cilia at top of head, internal organs visible. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

A Petri dish with colonies from a culture of Kluyveromyces lactis, a yeast commonly used for genetic studies and industrial applications

Hemp Floral Wax in a petri dish

centropyxis aculeata (amoeboid organism) under the microscope - optical microscope x400 magnification

$Streptococcus pneumoniae causes acute bacterial infections. Streptococcus pneumonia can be\ndifferentiated from other alpha-hemolytic streptococci\nbased on its susceptibility to optochin ( the disk is visible on the pic).$

bauxite is a natural mixture of aluminum oxides. Used in the production of alumina, cement and other industrial products

29 October Republic Day of Türkiye text on a red shiny sphere with a partial Turkish flag on white background. Easy to crop for all your print sizes and social media needs.

macro shooting of geological collection mineral - specimen of serpentine stone isolated on white background

Vitamin D3 Capsules. 3D Render

Lily leaf c.s. under microscope

Green quartz crystal isolated on the white background.

A listeria monocytogenes growing on an agar plate isolated on a black background

Fresh water diatom, a type of algae, Pinnularia species. Each diatom is composed of one cell and is mobile. Yellow-brown chloroplast fills cell. Warner Valley, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

clear gel drops in petri dish isolated on white background. Cosmetic laboratory research, medical or science test concept.

azurite mineral on white background studio shot

A quadrant streak of the bacterium Staphylococcus aureus cultured or inoculated on Baird-Parker agar with egg tellurite .

Bone marrow plasma cells .Plasma cell neoplasms are diseases in which the body makes too many plasma cells. Plasma cell neoplasms can be benign or malignant. Diagnosed with Immunostain CD138 positive.

Sample of biotite Schist, from the shear zone in the Beitbridge Complex in South Africa. Schist is metamorphic rock caused by pressure during medium grade metamorphism.

Fragment of uranium or yellow cake

Sclerotinia in the laboratory in the special rounded containers.

Close up of an olivine basalt lava rock.

set of paragonite stones cutout on white background

Close-up shot of a petri dish for checking an antibiotic in the laboratory.

Cassiterite tin oxide mineral isolated on white background

Mineral Platternit

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