Fig. 5From: Heterologous expression of an acidophilic multicopper oxidase in Escherichia coli and its applications in biorecovery of goldApplication of recombinant LacB in Au adsorption. a Supernatant fractions of MCO produced by BL21 cells harboring the pET28a-lacB vector under IPTG and copper (Sa), or IPTG only (Sb). b Spectrum scanning of free Au@NPs or Au@NPs adsorption by Sa and Sb. c Zeta potential analysis of MCO and MCO+Cu before and after adsorption of AuBack to article page