Table 4.

Classification of P_1B-ATPases.

P1B-ATPase Subgroup	Substrate	References
P1B-1	Cu(I), Ag(I)	[112,221,222]
P1B-2	Zn(II), Cd(II), Pb(II)	[221,222]
[P1B-3]	Reclassified as P1B-1	[220]
P1B-4	Co(II), Cd(II), Zn(II)	[223]
P1B-5	Ni(II), Fe(II)	[224]
P1B-6	Fe(II)	[222]
P1B-7	Unknown	[222]