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An artist’s representation of a block copolymer vesicle with carbon nanotube porins embedded in its walls. The vesicle sequesters a large enzyme, horseradish peroxidase. The image also shows luminol molecules traveling through the carbon nanotube porins into the interior of the vesicle where the enzymatic reaction with the horseradish peroxidase produces chemiluminescence. Image by Ella Maru Studios.