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. 2017 Jul 11;16:118. doi: 10.1186/s12934-017-0733-6

Fig. 7.

Fig. 7

Circular dichroism (CD) spectra of YlER at different concentrations of Zn2+ (a), Cu2+ (b), Mn2+ (c) and Fe2+ (d) between 0.05 and 0.5 mM