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A ball and stick + ribbons model of Human Growth Hormone, also known as Somatotropin.
orange: RNA primer; red: RNA template; light blue: proofreading riboexonuclease; mid blue: helicase; dark blue: RNA directed RNA polymerase; violet: non structural proteins (NSPs).
3D cartoon and Gaussian surface models. PDB 3kqg, chain id color scheme, white background.
Neuroendocrine carcinoma well differentiated (carcinoid) rectum with immunostain synaptophysin
Nucleosome, molecular model. 3D illustration. The nucleosome consists of a DNA double helix wrapped around a core of histone proteins.
Inside protein molecule
Biological protein and molecule, 3d rendering. 3D illustration.
Shiny artificial molecular structure in many colors. Horizontal composition, isolated on black background.
3d rendering of ubiquitin is attached to target proteins by a process called ubiquitination
Endosomes - 3d rendered image of Endosomes are membrane-bound organelles. They are parts of endocytic membrane transport pathway.  Endomembrane system in cells. Bilayer Lipid Membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.
3D cartoon and Gaussian surface models, PDB 2j0D, white background.
Slice of natural crystal for patterns and textures use with high resolution.
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 A-T Pair
Biological protein and molecule, 3d rendering. 3D illustration.
A ball and stick model of Human Insulin. Isolated on black.
brown fat cell also called brown adipose tissue side to side with white fat cell 3d rendering
Quantum Gravity 3d rendered image of a comprehensive exploration of Quantum Gravity theories. String theory, loop quantum gravity (LOG), causal dynamical triangulation, twistor theory, gravitational waves, spacetime, gravity waves, quantum mechanics, quantum entanglement concepts.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Haematocysts of single-celled green algae,
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
Microscopic photograph of a professionally prepared slide demonstrating vulvar malignant melanoma. Melanomas of the vulva and vagina are rare, accounting for no more that 2% of melanomas among women. Melanoma of the vulva behaves like melanoma in any other location and may affect a much younger population.
Biological protein and molecule, 3d rendering. 3D illustration.
abstract background of blue bubbles. *** The images uploaded are less than one month old, and are not available for use anywhere else ***
Backgrounds of Bacteria and Mold under the microscope in Lab.
Molecular model of lactose, a disaccharide sugar in milk.
3D cartoon and Gaussian surface models, chain id color scheme,  PDB 2iw2, white background
Models of an antibody broadly antagonistic to HIV.  A challenge in AIDS and HIV research is producing a vaccine which elicits antibodies effective against the many variations of HIV proteins.Isolated on white.
Immunotherapy of Alzheimer's disease: Monoclonal antibody (light blue) bound to an amyloid beta peptide (orange),  that is aggregated to amyloid beta fibrils, which build up amyloid plaques.
Blastomycosis is a fungal infection caused by inhaling Blastomyces dermatitidis spores. If it involves only the lungs, it is called pulmonary blastomycosis. Only about half of people with the disease have symptoms, which can include fever, cough, night sweats, muscle pains, weight loss, chest pain, and feeling tired.
Free Images: "bestof:PDB 1d7q EBI.jpg All beta proteins OB-fold Nucleic acid-binding proteins Cold shock DNA-binding domain-like Translation initiation factor-1a eIF1a EBI License"
Stat domain structure (zh-cn).svg
2ph1 pdb gallery nucleotide binding-protein-2 (MinD homolog).svg
Complement pathway.svg
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