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Main mutation site of the coronavirus variant B.1.531 emerged in South Africa. The spike protein (red) is bound to the angiotensin converting enzyme 2 (blue). The mutation is at the amino acid position 484 (yellow). Source: PDB entry 6cs2.

Pleomorphic liposarcoma. Site: Neck. Pleomorphic liposarcoma is a rare subtype of fat cell cancer in the body. It is a rare and very malignant type of tumor that usually arises from fat cells and deep soft tissues of the upper and lower extremities (shoulder, arms, legs, and thighs).

Backgrounds of Bacteria and Mold under the microscope in Lab.

flower bud of lilium brownii var. viridulum T.S. on microscopy

3D cartoon and Gaussian surface models, PDB 1j7n, chain id color scheme, white background

Chain or ribbon diatom, a type of algae.

Industrial process piping parts bellow flexible joint for expansion in piping system

Monkeypox Virus. 3D Render

Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet), ampicillin (red).

Diffuse large B-cell lymphoma, or DLBCL, is a cancer that starts in white blood cells called lymphocytes.

Calcidiol molecule, also called calcifediol, major circulating metabolite of vitamin D3 produced in liver, 3D illustration

$plant Flower bud of Lilium brownii var.viridulum T.S.\nunder light mircoscope with white background$

Pine mature wood cross section. Light microscope slide with microsection of an evergreen conifer in the genus Pinus. Plant anatomy. Biology. Photo.

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

$False colour electron microscope micrograph showing the Golgi apparatus (blue), mitochondria (green), very dilated RER cisterns (pale yellow) and secretory granules (dark red) in a gonadotropic cell.\$

Different germs in the human intestines called microbiome,Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria

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.

Myxoid liposarcoma. Myxoid/round cell liposarcoma, or MRCLS, is one of several types of liposarcoma. Liposarcoma is a rare cancer that grows in the cells that store fat in the body. MRCLS usually grows in the arms and legs. These tumors grow slowly, and they can spread to other parts of the body

Aerial view of loyster farm by Ardara, County Donegal - Ireland.

A molecular model of the flavonoid Quercetin. An antioxidant and anti-inflamatory, it is used as a nutritional suplement. It is commonly found in many fruits and vegetables and is a significant chemical component of tea. Isolated on white.

The study of plant tissues under the microscope in the laboratory.

Molecular model of lactose, a disaccharide sugar in milk.

3D cartoon and Gaussian surface models, chain id color scheme, PDB 2y73, white background

plant rape flower cross section under light mircoscope with white background

microscopic view of plant cells for botanic education and analysis

Paraganglioma is a type of neuroendocrine tumor that forms near certain blood vessels and nerves outside of the adrenal glands. The adrenal glands are important for making hormones that control many functions in the body and are located on top of the kidneys.

Dicot plants stem show plant vascular tissue under light microscope view for botany education.

Slice of natural crystal for patterns and textures use with high resolution.

Toxoplasma gondii oocyst under the microscope, isolated

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.

Free Images: "bestof:...Colonna Epoxidation Mechanism3.png en The generic mechanism for nucleophilic epoxidation of an electron-deficient olefin indicates that the reaction proceeds"

Epoxidation Mimoun Mechanism.svg

Corey-Winter reaction mechanism.svg

Mesitoic acid AAC1 reaction.svg

Corey-Winter olefination mechanism v1.svg

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Corey-Winter-Mechanism V.1.svg

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Nucleophilic Epoxidation Mechanism2.tiff

Julia-Colonna Epoxidation Ternary Complex3.png

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Staudinger Synthesis Mechanism.jpg

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