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From:
Published online Feb 10, 2009. doi: 10.1186/1471-2164-10-78
Table 1
General distribution of Ni and Co utilization in the three domains of life
ArchaeaBacteriaEukaryaTotal
Ni-utilizing organisms3931951409
Ni User (+)Ni Transporter* (+)2116649236
Ni Transporter (-)
& Unassigned transporter (+)
1181-92
Ni Transporter (-)
& Unassigned transporter (-)
762271

Ni User (-)Ni Transporter (+)-10-10
Co-utilizing organisms4541049504
B12 biosynthesis pathway (+)Co Transporter (+)15180-195
Co Transporter (-)
& Unassigned transporter (+)
1016-26
Co Transporter (-)
& Unassigned transporter (-)
913-22
B12 biosynthesis pathway (-)Co Transporter (+)----
Other (using external B12)1120149261

Organisms that use both Ni and Co382879335

Organisms that use neither Ni nor Co19869168
*: Ni transporter: Ni-specific transporter;
Co transporter: Co-specific transporter;
Unassigned transporter: close homologs of Ni/Co transporter families with unassigned function.
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