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zinc metallochaperone AztD Proteins of this family are components of the AztABCD zinc-uptake system. AztC, AztB, and AztA are the extracellular solute-binding protein (SBP), permease, and ATP-binding protein, respectively. AztD is a zinc chaperone to AztC, and it may store zinc in the periplasm for transfer through the AztABCD transporter system.
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