Fig. 2From: H2O2 biosensor consisted of hemoglobin-DNA conjugate on nanoporous gold thin film electrode with electrochemical signal enhancementSEM 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 conjugateBack to article page