Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
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
Female scientist in uniform and gloves pouring chemical solution into test tubes while working in lab doing research.
Close up Scientist man hands look at Glass Petri Dish use Microscope research in science laboratory. Crop biochemistry scientist hands using fungi Glass Petri Dish in laboratory chemistry medical lab
A model of a molecule of estriol, one of several estrogen steroid hormones produced by the sex glands in mammals.  Isolated on white.
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
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.
Researcher experimenting with a diagnostic plate in wells with culture medium. Scientist pipetting biological samples of cells into a 96-well microplate
3D Rendered Illustration, visualization of Neurons firing neurotransmitters in the synaptic gap.
The Raf/MEK/ERK (MAPK) propagates growth signals in the cell. Misregulation can lead to cancer.\nThe red dots on the active EGFR are phosphorylated tyrosines. PDB entries: 1egf, 1nql, 1m17, 2jwa, 3njp, 2gs6, 1gri, 1xd2, 3ksy, 5p21, 6xi7, 6q0j, 2y4i,
3D Illustration of Vitamin C Molecule
Antimicrobial susceptibility testing in petri dish. Microbiologist check Antibiotic resistance of bacteria
Structure of Escherichia Coli
Cell membrane cholesterol is shown in pink. 3D cartoon and Gaussian surface models, PDB 7rpk, white background.
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.
Angiopoietin 1, a protein with important roles in vascular development and angiogenesis. It also contributes to blood vessel maturation and stability. 3d rendering.
Cells in the body examined by endoscope
The calcitonin gene related peptide (yellow) binds to its receptor (blue) on neurons and smooth muscle cells of cerebral blood vessels, activating a signal cascade through G-proteins (dark blue) in this cells that  leads to a dilatation of the blood vessels (vasodilatation).
What micro plastic is made of - Chemical ingredients.\nClose up of microplastic on finger concept of water pollution and global warming
A 3D rendering illustrates a sandwich ELISA technique, where antigen detection is achieved between two layers of antibodies: a capture antibody and a detection antibody
Penicillium Chrysogenum (Penicillium Notatum)
3D cartoon and Gaussian surface models, PDB 6kxs, white background
DNA A-T Pair
Algal research, energy and healthcare treatment biotechnology, photobioreactor in medical science laboratory, algae fuel biofuel industry, coronavirus covid-19 vaccine, sustainable eco living
Fictitious molecule model inside red and blue pill isolated on white.
HER2 (light blue)  locked in the inactive conformation by Trastuzumab (left) and Pertuzumab. Trastuzumab has drastically improved the prognosis of HER2-positive breast cancer patients.
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.
Enzyme-linked immunosorbent assay (ELISA), Immunology testing method in laboratory
Evolution and Mystery of Life: Mollusks Living in Water
3D cartoon and Gaussian surface models, PDB 7bg9, white background.
Covid-19 Coronavirus Variants Omicron Delta Gamma Beta Alpha Pandemic Virus Disease Mutation
Free Images: "bestof:Estrogen receptor assay (2).jpg An Asian female laboratory technician performing a step in the estrogen receptor assay test She is seen with a test tube"
laboratory-experiment-science-421064.jpg
test-tube-lab-medical-research-218181.jpg
test-tube-lab-medical-research-214244.jpg
test-tube-lab-medical-research-214186.jpg
test-tube-lab-medical-research-214185.jpg
science-scientist-test-tube-1336664.jpg
laboratory-sample-tube-research-1291136.jpg
Laboratory-glassware.jpg
needle-the-syringe-blood-hospital-1291170.jpg
needle-the-syringe-blood-hospital-1291172.jpg
the-test-urine-container-urine-1006796.jpg
the-test-urine-container-urine-1006795.jpg
the-test-urine-container-urine-1006794.jpg
the-test-urine-container-urine-1006793.jpg
blood-medical-attempts-tube-1291132.jpg
blood-medical-attempts-tube-1291130.jpg
blood-medical-attempts-tube-1291131.jpg
laboratory-medical-lab-diagnostics-313867.jpg
chemistry-colors-chemical-tube-1527205.jpg
lab-research-chemistry-test-217078.jpg
lab-research-chemistry-test-217077.jpg
lab-research-chemistry-test-217076.jpg
lab-research-chemistry-test-217074.jpg
lab-research-chemistry-test-217044.jpg
lab-research-chemistry-test-217043.jpg
lab-research-chemistry-test-217042.jpg
lab-research-chemistry-test-217040.jpg
lab-research-chemistry-test-217041.jpg
female-researcher-holding-an-Erlenmeyer-flask-with-pink-liquid.jpg
Green-plants-in-a-row-of-test-tubes-with-water.jpg
Mammography.jpg
chemistry-lab-tube-laboratory-24497.svg
Etacstil skeletal.svg
test-tube-tube-empty-laboratory-303335.svg
test-tube-research-laboratory-lab-297751.svg
test-tube-rack-test-tubes-laboratory-297716.svg
test-tube-scale-laboratory-science-159154.svg
tube-test-lab-laboratory-equipment-37506.svg
test-tube-container-laboratory-37504.svg
science-test-tube-laboratory-test-718920.jpg
test-tube-laboratory-science-147009.svg
test-tube-container-chemistry-576792.svg
test-tube-chemistry-test-glass-297657.svg
test-glass-test-tube-chemistry-157105.svg
head-test-tube-chemistry-experiment-938459.jpg
test-tube-science-chemical-solution-144973.svg
test-tube-glass-measuring-cylinder-33570.svg
tube-test-chemistry-glass-lab-24461.svg
test-tube-chemistry-experiment-879777.jpg
test-tube-liquid-blue-science-309204.svg
test-tube-pouring-liquid-blue-309203.svg
Idoxifene.svg
Acolbifene.svg
Tetrahydrochrysene.svg
Broparestrol.svg
Estrobin.svg
Endoxifen.svg
test-glass-test-tube-chemistry-310824.svg
lab-tube-laboratory-test-tubes-36522.svg
flask-test-laboratory-experiment-29505.svg
tube-test-cork-glass-lab-chemical-29361.svg
Bazedoxifene.svg
Levormeloxifene.svg
Etacstil.svg
chemistry-isometric-test-tube-tubes-161145.svg
tube-lab-container-test-graded-37681.svg
Cyclofenil.svg
flask-glassware-chemistry-37369.svg
erythrocyte-hemocyte-red-blood-cell-355304.svg
blood-sample-tube-container-32548.svg
beaker-bubbles-flask-glass-lab-1293198.svg
lab-beaker-glassware-test-science-309424.svg
vial-tube-fluid-laboratory-41375.svg
tube-lab-chemistry-empty-science-40182.svg
tube-glass-glassware-chemistry-lab-38053.svg
virus-symbols-hazard-icon-41379.svg
beaker-glass-science-lab-23417.svg
Estrogen receptor assay (2).jpg
Estrogen receptor assay.jpg
Estrogen receptor assay (1).jpg
Estrogen receptor assay (4).jpg
Reading a computer printout.jpg
Estrogen receptor assay (3).jpg
Elisa assay test.jpg
Technician performing laboratory test.jpg
Extraction laboratory robot.jpg
Tissue culture (hamster).jpg
Technician performing drug synthesis.jpg
Test tubes (2).jpg
Monoclonal antibodies (1).jpg
Test tubes (1).jpg
Woman receives mammogram.jpg
Woman receives mammogram (2).jpg
Extraction laboratory (1).jpg
TMX Baseball Coils.jpg
050208-N-7217H-013.jpg
Estrogen receptor beta 1U3S.png
Estrogen receptor+lasofoxifene.png
Estrogen receptor beta.png
Estrogen receptor beta complex with DNA.png
Terms of Use   Search of the Day