Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
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.
anaplastic thyroid carcinoma with heterologous differentiation (leiomyosarcoma)
orange: RNA primer; red: RNA template; light blue: proofreading riboexonuclease; mid blue: helicase; dark blue: RNA directed RNA polymerase; violet: non structural proteins (NSPs).
Molecular model of Thymine, 1 of 4 nucleobases to form DNA
Dna structure on science background. 3d illustration
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
Liver Fluke Section under light microscope with white background
3D cartoon and Gaussian surface models, PDB 6gu2, white background
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
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
Chemical formula of Testosterone
CRISPR-Cas9\nproteins recognize and cut foreign pathogenic DNA
Close-up shot of a petri dish for checking clear zone an antibiotic in the laboratory.
DNA Strings On White Background. Medical Research, Gene Engineering And Biotechnology Concept
Hospital wastewater contain high abundances of antibiotic resistance genes compared to municipal wastewater. The antibiotic-resistant organisms originate from hospital patients.
3D cartoon and Gaussian surface models, PDB 2gjx, white background
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.
The intermembrane transporter of the Gram-negative bacterium Acinetobacter baylyi transports a lipopolysaccharide (orange) through the inner membrane consuming ATP (red)
Inside protein molecule
Different fresh products and paper with Tyrosine chemical formula on white wooden table, flat lay. Sources of essential amino acids
Photomicrograph of rotifer. Rapidly rotating cilia at top of head, internal organs visible. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
Food containing natural iron. Fe: Liver, avocado, broccoli, spinach, parsley, beans, nuts, on a white background. Top view.
Zinc supplements on their periodic table square.
3D cartoon and Gaussian surface models, PDB 1j7n, chain id color scheme, white background
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).
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.
A ball and stick model of a molecule of Human Interferon. Interferons are proteins important in the working of the immune system and are produced in large numbers in the presence of viruses, bacteria, tumors and parasites. Interferons are used in drugs to combat cancer, multiple sclerosis, hepatitis B and C and other diseases. Isolated on white.
Tryptophan or Trp is an alpha-amino acid that is used in the biosynthesis of proteins, 3d illustration
DNA A-T Pair
Free Images: "bestof:PDB 1a36 EBI.jpg Multi-domain proteins alpha and beta Eukaryotic DNA topoisomerase I N-terminal DNA-binding fragment Eukaryotic DNA topoisomerase I N-terminal"
Camptothecin binding.svg
Gene2-plain-norsk.svg
Animal mitochondrion diagram it.svg
Animal mitochondrion diagram en (edit).svg
Endomembrane system diagram en (edit).svg
Animal mitochondrion diagram en.svg
Animal mitochondrion diagram bn.svg
PDB 1a36 EBI.jpg
PDB 1k4t EBI.jpg
PDB 1rrj EBI.jpg
PDB 1rr8 EBI.jpg
PDB 1sc7 EBI.jpg
PDB 1seu EBI.jpg
PDB 1tl8 EBI.jpg
PDB 1t8i EBI.jpg
PDB 1nh3 EBI.jpg
PDB 1k4s EBI.jpg
PDB 1lpq EBI.jpg
PDB 1r49 EBI.jpg
PDB 1ois EBI.jpg
PDB 1a31 EBI.jpg
PDB 1a35 EBI.jpg
PDB 1ej9 EBI.jpg
PDB 2rgr EBI.png
PDB 1bjt EBI.jpg
PDB 1bgw EBI.jpg
PDB 1vcc EBI.jpg
PDB 1mw9 EBI.jpg
PDB 1cy9 EBI.jpg
PDB 1mw8 EBI.jpg
PDB 1ecl EBI.jpg
PDB 1cyy EBI.jpg
PDB 1cy2 EBI.jpg
PDB 1cy1 EBI.jpg
PDB 1cy7 EBI.jpg
PDB 1cy8 EBI.jpg
PDB 1cy0 EBI.jpg
PDB 1cy4 EBI.jpg
PDB 1cy6 EBI.jpg
PDB 1kl9 EBI.jpg
PDB 1q8k EBI.jpg
PDB 1q46 EBI.jpg
PDB 2aho EBI.jpg
PDB 2ba0 EBI.png
PDB 2je6 EBI.png
PDB 2jea EBI.png
PDB 2nn6 EBI.png
PDB 1a41 EBI.jpg
PDB 1yua EBI.jpg
PDB 1rz4 EBI.jpg
PDB 2iwx EBI.jpg
PDB 2brc EBI.jpg
PDB 1zwh EBI.jpg
PDB 1amw EBI.jpg
PDB 1zw9 EBI.jpg
PDB 1ah6 EBI.jpg
PDB 2fxs EBI.jpg
PDB 1am1 EBI.jpg
PDB 2bre EBI.jpg
PDB 1ah8 EBI.jpg
PDB 1bgq EBI.jpg
PDB 1a4h EBI.jpg
PDB 2iws EBI.jpg
PDB 2iwu EBI.jpg
PDB 1uyl EBI.jpg
PDB 1byq EBI.jpg
PDB 2byi EBI.jpg
PDB 1yer EBI.jpg
PDB 1yc1 EBI.jpg
PDB 1osf EBI.jpg
PDB 1yc4 EBI.jpg
PDB 2byh EBI.jpg
PDB 1uy6 EBI.jpg
PDB 2h55 EBI.jpg
PDB 1uy7 EBI.jpg
PDB 1yet EBI.jpg
PDB 2cdd EBI.jpg
PDB 2uwd EBI.jpg
PDB 1uyi EBI.jpg
PDB 1uye EBI.jpg
PDB 1uyd EBI.jpg
PDB 1uy9 EBI.jpg
PDB 1uy8 EBI.jpg
PDB 2ccs EBI.jpg
PDB 1uyg EBI.jpg
PDB 2fwy EBI.jpg
PDB 2bz5 EBI.jpg
PDB 1uyc EBI.jpg
PDB 1yc3 EBI.jpg
PDB 2bsm EBI.jpg
PDB 2fwz EBI.jpg
PDB 1uyk EBI.jpg
PDB 1uyf EBI.jpg
PDB 1yes EBI.jpg
PDB 2cct EBI.jpg
PDB 1uyh EBI.jpg
PDB 1uym EBI.jpg
PDB 2ccu EBI.jpg
PDB 2gqp EBI.jpg
PDB 1qy5 EBI.jpg
Terms of Use   Search of the Day