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Green algae cells background
Trematode parasite under a microscope
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,
Micrograph of amoeba.  Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live animal, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Bacteria Aggregatibacter, 3D illustration. Aggregatibacter aphrophilus and A. actinomycetemcomitans, Gram-negative bacteria, part of the normal flora of the mouth and throat, also cause endocarditis
Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens.  Depth of focus is extremely shallow (just a few microns).  Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Diatoms, algae under microscopic view, phytoplankton, fossils, silica, golden yellow algae
abs Bacteria concept - 3d rendered microbiology image. Medical research, health-care concept.
Host cells with spores (mold) are inside wood under the microscope for education.
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
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.
Liver Fluke Section under light microscope with white background
Escherichia Coli (E. Coli.) bacteria under microscope
Close-up shot of a petri dish for checking an antibiotic in the laboratory.
Leiden leaf c.s. under microscope
Bacteria pathogen - 3d rendered microbiology image. Illustrate of Lactobacillus Bulgaricus Bacteria, Microbacterium Tuberculosis Bacteria (MTB). Medical research, health-care concept. SEM (TEM) scanning view
Photomicrograph of algae, Cosmarium turpinii, a desmid. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
Freshwater aquatic zooplankton and algae under microscope view
The intermembrane transporter of the Gram-negative bacterium Acinetobacter baylyi transports a lipopolysaccharide (orange) through the inner membrane consuming ATP (red)
Green chlorophyll Cells under heavy magnification isolated on dark background
Freshwater Closterium algae (unicellular charophyte green algae) - optical microscope x200 magnification
Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens.  Depth of focus is extremely shallow (just a few microns).  Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
Hand fungal infection. Ringworm, tinea manuum and close-up view of dermatophyte fungi Microsporum canis, Microsporum audouinii, Trichophyton rubrum and Trichophyton mentagrophytes, 3D illustration
Abs Bubonic plague bacteria - 3d rendered image structure view on black background. \nPlague Infection concept.  Hologram bacteria view.
Eggs of helminth and Finding parasites in feces, analyze by microscope in laboratory.
In vitro bacterial culture
Fluconazole is an antifungal medication used to treat fungal infections like candidiasis and mycosis. Fluconazole alters the active site of the lanosterol 14 alpha-demethylase preventing the demethylation of lanosterol, an essential step in the biosynthesis of ergosterol. Ergosterol plays an important structural role in the regulation of membrane fluidity and permeability. Source: PDB entry 5esf.
The pale lactose nonfermenting bacterie (blue arrow) are Salminella typhi.  Salmonella in general does not ferment lactose (colorless colonies),  Salmonella typhi,unlike other salmonallae, produce little hydrogen sulfide (H2S) gas.  The resulting bacterial colonies will appear colorless with colorless or very discrete black centers.
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.
Microalgae under microscopic view, green algae, cyanobacteria, phytoplankton, diatom, algae mix collage background
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