Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
A model of a transcription factor binding to a strand of DNA. Transcription factors are proteins which bind to specific sequences of DNA, enabling and controlling the copying of genetic data.
abstract binary random white background 3D renderingabstract background 3D rendering - letters conceptabstract background 3D rendering -  multi ethnic conceptabstract background 3D rendering - letters concept
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Painted on Digital Tablet; Mosaic Pixelated, Abstract Planets
Cell Membrane and Molecules, 3d rendering. Computer digital drawing.
Abs technology COVID-19 research - 3d rendered image. Pandemic wave.\nViral Infection concept. Delta, Omicron (B.1.1.529) variant. Sars-cov-2, 2019-nCoV, Coronavirus.\nAntibody, Antigen, stealth, Vaccine technology concept.
Isolated lipid bilayer coating mesoporous silica nanoparticle 3d rendering in the background
plant Young stem of Ligustrum lucidum T.S. under light mircoscope with white background
Plasma Membrane Of A Cell With other molecules
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.
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.
macro photo of different structures, hexagons, pentagons,  in green colored water soap bubble
Proliferating cell nuclear antigen (PCNA) is a DNA clamp that acts as a processivity factor for DNA polymerase δ in eukaryotic cells and is essential for replication. PCNA is a homotrimer and achieves its processivity by encircling the DNA, where it acts as a scaffold to recruit proteins involved in DNA replication, DNA repair, chromatin remodeling and epigenetics. 3D cartoon and Gaussian surface models, chain instance color scheme, based on PDB 3wgw, white background.
Close up of cristal beads
Lime trunk
plant rape flower cross section under light mircoscope with white background
3D illustration of sanitary piping
Inside protein molecule
Plant tissue Structure, section (tissue) of stem plant tissue under a light microscope.
A conceptual image of an abstract network of multi-coloured organic strands arranged in a non regular pattern all connected together in a complex manner. The network is made from smaller multi-coloured squares and polyhedra, in vivid colours against a pastel toned background. Shows background and foreground elements to the structure.
Biological protein and molecule, 3d rendering. 3D illustration.
corn stem micrograph with dye
The algae species Pediastrum boryanum under the microscope.
Slice of natural crystal for patterns and textures use with high resolution.
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
Set gemstones crystal minerals for relaxation and meditation. Energy healing minerals. Witchcraft, Crystal Ritual, Relaxing Chakra, aura readings. Flat lay, top view
microscopic view of plant cells for botanic education and analysis
A shining grain of information
Free Images: "bestof:Euglenid pellicula scheme.svg Scheme of euglenid pellicula structure 1 cell membrane; 2 protein pellicular strip; 3 microtubules; 4 traverse filament; 5"
Euglenid pellicula scheme.svg
Scheme facilitated diffusion in cell membrane-zh (zh-tw).svg
Scheme facilitated diffusion in cell membrane-en.svg
Scheme facilitated diffusion in cell membrane-zh.svg
Scheme facilitated diffusion in cell membrane-eo.svg
Scheme facilitated diffusion in cell membrane-ca.svg
Lipid raft organisation scheme.svg
Scheme simple diffusion in cell membrane-es.svg
Scheme simple diffusion in cell membrane-de.svg
Scheme simple diffusion in cell membrane-zh (zh-cn).svg
Scheme simple diffusion in cell membrane-zh (zh-tw).svg
Scheme facilitated diffusion in cell membrane-es.svg
Scheme simple diffusion in cell membrane-en.svg
Scheme simple diffusion in cell membrane-de 02.svg
Scheme facilitated diffusion in cell membrane-fr.svg
Scheme simple diffusion in cell membrane-pl.svg
Scheme simple diffusion in cell membrane-fr.svg
Scheme simple diffusion in cell membrane-ca.svg
Scheme sodium-potassium pump-it.svg
Scheme sodium-potassium pump-en-2.svg
Scheme sodium-potassium pump-ja.svg
Scheme sodium-potassium pump-zh.svg
Scheme sodium-potassium pump-en.svg
Scheme sodium-potassium pump-pl.svg
Scheme sodium-potassium pump-bs.svg
Scheme sodium-potassium pump-he.svg
Scheme sodium-potassium pump-zh (zh-tw).svg
Scheme secundary active transport-en.svg
Scheme secundary active transport-heb.svg
Scheme sodium-potassium pump-el.svg
Scheme secundary active transport-pl.svg
Scheme sodium-potassium pump-cs.svg
Scheme sodium-potassium pump-de.svg
Scheme sodium-potassium pump-ca.svg
Cellular tight junction keys.svg
Scheme simple diffusion in cell membrane-he.png
Scheme facilitated diffusion in cell membrane-de.png
Scheme simple diffusion in cell membrane-de.png
3D_protein.jpg
GIRK 1N9P.png
Scheme sodium-potassium pump-ar-2.png
Chlamydomanas reinhardtii Flagella 9 - TEM.jpg
Terms of Use   Search of the Day