Fig. 2From: Ultrasensitive and rapid count of Escherichia coli using magnetic nanoparticle probe under dark-field microscopeSDS-PAGE analysis of prepared MNP probes. Column 1: 10 μL of as-synthesized MNP; Column 2: 5 μg anti-E. coli antibody; Column 3: 10 μL of MNP probesBack to article page