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. 2019 Jan 3;6:1. doi: 10.1186/s40580-018-0172-z

Fig. 2.

Fig. 2

SEM images of a bare gold; b NPGF electrode; c SDS-PAGE (lane 1 for protein ladder, lane 2 for Hb, lane 3 for Hb-DNA conjugate); d UV–VIS results of Hb-DNA conjugate