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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.

DNA Helix - 3d rendered image. Genetic research concept. Complex spiral structure illustration. Medical, science, genetic biotechnology, gene cell, chromosome idea. DNA strands on dark background . Science nanotechnology.

Folic acid, folate molecule. It is known as vitamin B9. Molecular model. 3D rendering. Illustration

High angle view of an empty tennis court (Hard court)

Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration

A ball and stick model of the common sugar sucrose.

Dna structure on science background. 3d illustration

DNA mutation, a mutation is a change in a DNA sequence, mutations can result from DNA copying mistakes made during cell division.

Energy exchange of electrons between atoms

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).

Tennis ball hitting the net during a tournament match on clay court.

Chain of amino acid or bio molecules called protein - 3d illustration

B-chain pentamer and A-chain subunit (green), 3D cartoon and Gaussian surface model, white background

Different vegetables, seeds and fruits on black table, flat lay. Sources of essential amino acids

A ball-and-stick plus ribbons molecular model of the hormone Orexin, also known as Hypocretin. Orexin is involved in the regulation of the sleep/wake cycle and it stimulates apetite, wakefulness and energy expenditure. It has been linked with Alzheimer's disease. Isolated on white.

$The Raf/MEK/ERK (MAPK) propagates growth signals in the cell. Misregulation can lead to cancer.\nThe red dots on the active EGFR are phosphorylated tyrosines. PDB entries: 1egf, 1nql, 1m17, 2jwa, 3njp, 2gs6, 1gri, 1xd2, 3ksy, 5p21, 6xi7, 6q0j, 2y4i,$

$Model of DNA Base Pair adenine (A) and thymine (T)\n\nFind more molecules in the Lightbox [url=http://www.istockphoto.com/search/lightbox/7500191][i] 'World of Molecules'[/i][/url], or contact me on customized design/rendering of any molecules in 3D (see some examples below). \n\n[img]http://www.drugmodel.com/360/superglassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/capsule900.jpg[/img] \n[img]http://www.drugmodel.com/360/glassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/heart900.jpg[/img] \n[img]http://www.drugmodel.com/360/viruskiller900.jpg[/img] \n[img]http://www.drugmodel.com/360/mesh900.jpg[/img] \n[img]http://www.drugmodel.com/360/cartoon900.jpg[/img] \n[img]http://www.drugmodel.com/360/photo900.jpg[/img] \n[img]http://www.drugmodel.com/360/ovoid900.jpg[/img] \n[img]http://www.drugmodel.com/360/swirlcone900.jpg[/img] \n[img]http://www.drugmodel.com/360/super900.jpg[/img] \n[img]http://www.drugmodel.com/360/glowing900.jpg[/img]$

Hyaluronan, hyaluronic acid, HA, hyaluronate molecule, short fragment. Molecular model. 3D rendering. Illustration

Rendered coronavirus/2019-nCoV single-stranded RNA, built from experimentally determined Ebola virus crystal structure. Color symbols - bluewhite=carbon, pink=oxygen, lightblue=nitrogen, white=hydrogen, lavender=phosphorus

3D rendering of beta-carotene molecules, also called carotenoids are considered antioxidants

Unrecognizable female tennis player holding tennis ball on the racket

Molecule with water background, 3d rendering. Digital drawing.

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.

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.

Imipenem molecule. A broad-spectrum carbapenem antibiotic used to treat severe bacterial infections. Molecular model. 3D rendering. Illustration

Unrecognisable man standing on a tennis court after finishing his practice session

Free Images: "bestof:ATP complexation.jpg Vista d'un ATP xuníu al dominiu B View of an ATP binding site of the B domain Own Mikestump Ligases"

Swine flu infection exponent by county June 2009.svg

2009 ATP tournaments distribution map.svg

2010 ATP tournaments distribution map.svg

Substrate-level phosphorylation generating ATP.svg

Biotin dependent carboxylases and citric acid cycle-de.svg

Work function mismatch gold aluminum.svg

Anthrax-toxin-edema-factor+calmodulin 1XVF.png

ATP Master 1000 & WTA Premier Mandatory-es.png

Mechanism for the binding of ATP and then Ubiquitin substrate to the ubiquitin activating enzyme.png