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. Author manuscript; available in PMC: 2012 Jul 16.
Published in final edited form as: Small. 2011 Feb 2;7(5):613–624. doi: 10.1002/smll.201002089

Figure 1.

Figure 1

Reagent usage in sandwich immunoassay systems. Fundamental differences between ELISA and the bead-based PBNC for protein measurements include size and structure. By using a) 3D versus 2D reaction areas and b) a lattice of capture antibodies versus a planar system, c) the PBNC allows for a higher density of reagent capture centers and thus a high capacity for reporting analyte.