Fig. 6From: Ultrasensitive bioassaying of HER-2 protein for diagnosis of breast cancer using reduced graphene oxide/chitosan as nanobiocompatible platformIdentification of the HER-2 in untreated serum samples from breast cancer patients. a The ECL plots; b the correlated histograms. The error bares were obtained by three ECL measurements for each sample and c immunohistochemical imaging of breast samples in cancer patients. The HER-2 positive cells were indicated by the black arrows (brown-colored cells)Back to article page