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    Illustration of purple chloride channels in cell membrane. — Stock Photo
    Illustration of purple chloride channels in cell membrane.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Migraine therapy and CGRP receptor, illustration. — Stock Photo
    Migraine therapy and CGRP receptor, illustration.
    3d illustration of top view of skin-colored cell pattern. — Stock Photo
    3d illustration of top view of skin-colored cell pattern.
    Digital illustration of structure of bilayer with phospholipids plasma membrane enclosing cells. — Stock Photo
    Digital illustration of structure of bilayer with phospholipids plasma membrane enclosing cells.
    3d illustration of blue cells pattern with red nuclei. — Stock Photo
    3d illustration of blue cells pattern with red nuclei.
    3d illustration of red cells pattern, full frame. — Stock Photo
    3d illustration of red cells pattern, full frame.
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Layer of cells, computer illustration — Stock Photo
    Layer of cells, computer illustration
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome) — Stock Photo
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome)
    Enkephalin binding to opioid receptor, digital illustration. — Stock Photo
    Enkephalin binding to opioid receptor, digital illustration.
    Global spread of coronaviruses, conceptual computer illustration — Stock Photo
    Global spread of coronaviruses, conceptual computer illustration
    T-cell receptor-MHC-antigen complexes — Stock Photo
    T-cell receptor-MHC-antigen complexes
    Single abstract bacterium on black background, computer illustration. — Stock Photo
    Single abstract bacterium on black background, computer illustration.
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome) — Stock Photo
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome)
    3d illustration of cross-section of ebola pathogen. — Stock Photo
    3d illustration of cross-section of ebola pathogen.
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Insulin binding to insulin receptor — Stock Photo
    Insulin binding to insulin receptor
    Calcitonin peptide bound to receptor, illustration. — Stock Photo
    Calcitonin peptide bound to receptor, illustration.
    Bacterial wall and antibiotic resistance — Stock Photo
    Bacterial wall and antibiotic resistance
    Illustration of transparent cells with splitting nucleus, cell membrane and visible chromosomes. — Stock Photo
    Illustration of transparent cells with splitting nucleus, cell membrane and visible chromosomes.
    Cell membrane structure, digital illustration. — Stock Photo
    Cell membrane structure, digital illustration.
    Illustration of bacteriophages (purple) infecting a bacterial cell. Bacteriophages, or phages, infect a bacterium by attaching to its surface (blue) and injecting genetic material (brown) into the cell — Stock Photo
    Illustration of bacteriophages (purple) infecting a bacterial cell. Bacteriophages, or phages, infect a bacterium by attaching to its surface (blue) and injecting genetic material (brown) into the cell
    T-cell receptor-MHC-antigen complex — Stock Photo
    T-cell receptor-MHC-antigen complex
    Opioid and cannabinoid receptors in brain cell membrane, illustration. — Stock Photo
    Opioid and cannabinoid receptors in brain cell membrane, illustration.
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Digital illustration of cutaway view of human cell membrane. — Stock Photo
    Digital illustration of cutaway view of human cell membrane.
    Illustration of transmembrane proteins and glycolipids on outer surface of cell membrane. — Stock Photo
    Illustration of transmembrane proteins and glycolipids on outer surface of cell membrane.
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory — Stock Photo
    Engineer installing new membranes in an O2 electrochemical sensor probe in a laboratory
    Human white blood cell — Stock Photo
    Human white blood cell
    Taking out the honey at the bee farm — Stock Photo
    Taking out the honey at the bee farm
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Coronaviruses causing pneumonia, conceptual computer illustration — Stock Photo
    Coronaviruses causing pneumonia, conceptual computer illustration
    Coronavirus particles, computer illustration — Stock Photo
    Coronavirus particles, computer illustration
    Insulin binding to insulin receptor — Stock Photo
    Insulin binding to insulin receptor
    Activation of T-cell immune response, illustration. — Stock Photo
    Activation of T-cell immune response, illustration.
    Coronaviruses causing pneumonia, conceptual computer illustration — Stock Photo
    Coronaviruses causing pneumonia, conceptual computer illustration
    Animal cell structure — Stock Photo
    Animal cell structure
    Medical illustration of endolymph in the membranous labyrinth of the inner ear — Stock Photo
    Medical illustration of endolymph in the membranous labyrinth of the inner ear
    3d rendered illustration of dura mater in brain on white background. — Stock Photo
    3d rendered illustration of dura mater in brain on white background.
    Spinal cord cross-section — Stock Photo
    Spinal cord cross-section
    Structure of animal cell — Stock Photo
    Structure of animal cell
    Coronavirus particle, computer illustration — Stock Photo
    Coronavirus particle, computer illustration
    Coronaviruses causing pneumonia, conceptual computer illustration — Stock Photo
    Coronaviruses causing pneumonia, conceptual computer illustration
    Morphine binding to opioid receptors, digital illustration. — Stock Photo
    Morphine binding to opioid receptors, digital illustration.
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome) — Stock Photo
    Coronavirus particles, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome)
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    Venule. Coloured transmission electron micrograph (TEM). Venules are small veins that transport deoxygenated blood from the capillary beds to the veins. Endothelial cells line the entire circulatory system — Stock Photo
    Venule. Coloured transmission electron micrograph (TEM). Venules are small veins that transport deoxygenated blood from the capillary beds to the veins. Endothelial cells line the entire circulatory system
    Coronavirus particle, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome) — Stock Photo
    Coronavirus particle, computer illustration. Different strains of coronavirus are responsible for diseases such as the common cold, gastroenteritis and SARS (severe acute respiratory syndrome)
    Abstract human immunodeficiency virus structure, scientific digital illustration. — Stock Photo
    Abstract human immunodeficiency virus structure, scientific digital illustration.
    Structure of animal cell — Stock Photo
    Structure of animal cell
    Structure of cellular organelles — Stock Photo
    Structure of cellular organelles