ArticleResearch square2023
Cryo-EM and AFM visualize linear polyorganophosphazene: individual chains and single-chain assemblies with proteins.
Article in Research square, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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4 authors.
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Abstract
Polyorganophosphazenes are biodegradable macromolecules with potent immunoadjuvant activity that self-assemble with protein antigens to provide biological activity. Direct imaging by cryogenic electron microscopy reveals the coil structure of the highly-charged high molecular mass synthetic polyorganophosphazenes within the vitrified state without any additives for contrast enhancement for the first time. Upon mixing with protein antigens under a controlled stoichiometric ratio, multiple proteins bind at the single chain level revealing a structural change reminiscent of compact spherical complexes or stiffened coils depending on the bound protein antigen. The structural outcome depends on the protein charge density that cannot be deduced by methods, such as dynamic light scattering, thus revealing direct morphological insight necessary to understand
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