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Test strip 2 Illustration and Icon
Test strip 2
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Test strip 2. Schematic of a lateral flow immunoassay showing colored nanoparticle–antibody conjugates forming a sandwich with target antigen and generating two visible lines on a nitrocellulose membrane. The device, a point-of-care biosensor, includes a sample pad, membrane with test and control lines, and an absorbent pad. At the molecular hierarchy, antigen–antibody binding on the membrane produces the macroscopic color signal. Relevant fields include immunology, analytical chemistry, and clinical diagnostics. Abbreviations: LFA/LFIA (lateral flow assay/lateral flow immunoassay).
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