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(A) Principle of giant magneto-resistance-based sensing with streptavidin-coated magnetic nanotags. (B) Multianalyte protein assay using the GMR sensor functionalized with antibodies specific to the measured proteins. The sample volume was 20 μl at 1 pg/ml concentration.
BSA: Bovine serum albumin; CEA: Carcinoembryonic antigen.
Reproduced with permission from [60].
