Table 2.

Summary of Zn²⁺ specific substrate-binding proteins (SBPs) and their associated accessory zinc-chaperone.

SBP-Dependent ABC Transporter	Associated Zinc-Chaperone Component	Refs.
ZnuA	ZinT (periplasmic protein)	[47]
AdcA (N-terminal domain)	AdcA (C-terminal domain)	[58]
AdcAII	PhtD (surface protein)	[59]
AztC	AztD (periplasmic protein)	[40]