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Microfluidic devices for protein detection. a) Photo of microfluidic chip and schematic illustration of loading of multiple reagents to detect HIV and syphilis antigens. Reproduced with permission.[8] Copyright 2011, NPG. b) Schematic illustration of volumetric bar-chart chip. Protein concentrations are converted into travel distance of ink bars by ELISA reaction. Reproduced with permission.[11c] Copyright 2012, NPG.
