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The LDL-receptor (red) is a membrane protein found in almost every human cell. It binds to the apoprotein B100 from LDL-particles and mediates their internalization (endocytosis) in the cell. This occurs in almost all cells but mainly in the liver where it removes about 70 % of LDL from the circulation.
The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.
Proteasomes are molecular machines for breaking down proteins called proteolysis, only target proteins that have been marked for destruction called ubiquitin to the target protein, 3d rendering
A ball and stick + ribbons model of Human Growth Hormone, also known as Somatotropin.
3D cartoon and Gaussian surface models, PDB 6vg8, white background
Inside protein molecule
Nucleosome, molecular model. 3D illustration. The nucleosome consists of a DNA double helix wrapped around a core of histone proteins.
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.
Inhibition of mTORC1 by rapamycin leads to immunosuppression, prevention of trasplant rejection and inhibition of tumor growth.
anaplastic thyroid carcinoma with heterologous differentiation (leiomyosarcoma)
DNA close-up, DNA Molecule Model, DNA Strands, DNA animation
Cells in the body examined by endoscope
3D cartoon and Gaussian surface models, PDB 2j0D, white background.
Slice of natural crystal for patterns and textures use with high resolution.
A model of a molecule of arginine, an amino acid. Amino acids are the building blocks of proteins and have many functions in metabolism. In particular, Arginine has an important function in the immune system, wound healing and cell division.
Biological protein and molecule, 3d rendering. 3D illustration.
A  RNA polymerase (yeast) is composed of several proteins. It unwinds DNA strands (violet) and builds RNA (red) out of the nucleotides uridine, adenosine, cytlidine and guanosine monophosphate.
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.
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
Shiny artificial molecular structure in many colors. Horizontal composition, isolated on black background.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
DNA A-T Pair
Backgrounds of Bacteria and Mold under the microscope in Lab.
Focal nodular hyperplasia (FNH) is a benign liver lesion that is composed of a proliferation of hyperplastic hepatocytes surrounding a central stellate scar. Typically, FNH is a solitary lesion that is more commonly seen in women.
orange: RNA primer; red: RNA template; light blue: proofreading riboexonuclease; mid blue: helicase; dark blue: RNA directed RNA polymerase; violet: non structural proteins (NSPs).
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.
Protein enzymes fold into their structure to fulfill their function - 3d illustration
Different germs in the human intestines called microbiome,Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria
3D cartoon and Gaussian surface models, chain id color scheme, PDB 3omv, white background
Molecular model of amylose, one of the two sugar components in starch
Free Images: "bestof:PDB 1v1q EBI.jpg All beta proteins OB-fold Nucleic acid-binding proteins Single strand DNA-binding domain SSB Primosomal replication protein N PriB EBI License"
2ph1 pdb gallery nucleotide binding-protein-2 (MinD homolog).svg
Stat domain structure (zh-cn).svg
Proteinoxidation 03.svg
Complement pathway.svg
Hepatitis B virus v2.svg
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