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A Gram-negative bacterial envelope cut into a tidy slab that shows every layer of the cell wall in order. Beaded LPS chains rise from the outer membrane like little antennae, with porin channels set into the lipid bilayer below. A thin peptidoglycan mesh sits in the middle, linked by fine strands to the inner membrane at the bottom, which carries its own embedded proteins. The rounded tray frames the layers neatly, suiting a microbiology lesson on antibiotics, a lab desk or a classroom shelf.

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