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A ribbons model of Human Growth Hormone, also known as Somatotropin, with a translucent surface model.

Aztreonam is an inhibitor of resistant bacteria from Acinetobacter species. Aztreonam (orange) inhibits the bacterial enzyme beta-lactamase (blue) that is responsible for the antibiotic resistance.

Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer,lipid bi-layer cell anatomy

3D cartoon and Gaussian surface models, PDB 6h5i, white background

ATP Synthase Protein - 3d rendered image. Medical microbiology concept. Structure and conformational states of the bovine mitochondrial ATP (Adenosine triphosphate) synthase. Chemical energy is synthesized in eukaryotic cells primarily. Hydrolase. Hologram view. HUD, FUI

Lipid bilayer cell membrane with membrane and intracellular receptors

$The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.$

Ribonucleic acid strands consisting of nucleotides important for protein bio-synthesis - 3d illustration

Frataxin (human) mitochondrial protein. Reduced expression causes Friedreich's ataxia. 3D illustration. Cartoon & wireframe representation.

Evolution and Mystery of Life: Mollusks Living in Water

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.

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

A combined image of various micro organisms in colorhttp://195.154.178.81/DATA/istock_collage/0/shoots/785093.jpg

3d rendering of ubiquitin is attached to target proteins by a process called ubiquitination

Complement component 3, often simply called C3, is a protein of the immune system. It plays a central role in the complement system and contributes to innate immunity. 3D cartoon and Gaussian surface models with differently colored protein chains, white background.

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

$Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.$

Gamma secretase protein complex. Multi-subunit intramembrane protease that plays role in processing of proteins. 3D illustration.

Cystic fibrosis transmembrane conductance regulator (CFTR) allows negatively-charged ions, such as chloride and bicarbonate, to pass through the membrane of lung epithell cells. Malfunction leads to cystic fibrosis. Left: inactive form. ATP (red)

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.

Life cycle of filamentous bacteriophage M13 in phospholipid bilayers 3d rendering

Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer

Structure of novel coronavirus spike receptor-binding domain (pink) complexed with its receptor ACE2 (blue), surface modeel, white background

Adenovirus enter cells throughs membrane

Bilayer Lipid Membrane - 3d rendered image of Cell Membrane Phospholipid Structure, Phospholipid bilayer of the cell membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.

From left to right: the NMDA and AMPA receptors transport calcium cations into neurons after being activated by the neurotransmitter glutamate and the GABA receptor (right) transport chloride anions after the activation by gamma aminobutyrate. PDB entries: 6wht, 3kg2, 6d6u

Free Images: "bestof:PDB 2hg3 EBI.jpg Membrane and cell surface proteins and peptides Bacterial photosystem II reaction centre L and M subunits Bacterial photosystem II reaction"

Reaction of Propan-1-ol and Copper(II) oxide to Propionaldehyde.svg

Prokaryote cell diagram international.svg

Bischler-Napieralski Isoquinoline synthesis mechanism II.svg

Deepwater Horizon oil spill recovery context numbered.svg