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Table 1 Transition metal content in RNA structures.

From: On the origin of life in the Zinc world. 2. Validation of the hypothesis on the photosynthesizing zinc sulfide edifices as cradles of life on Earth

Group 3
(IIIB)
4
(IVB)
5
(VB)
6
(VIB)
7
(VIIB)
8
(VIIIB)
9
(VIIIB)
10
(VIIIB)
11
(IB)
12
(IIB)
Period 4 Sc
0
Ti
0
V
2
Cr
0
Mn
16
Fe
0
Co
32
Ni
0
Cu
0
Zn
64
Period 5 Y
0
Zr
0
Nb
0
Mo
0
Tc
0
Ru
1
Rh
4
Pd
0
Ag
0
Cd
42
Period 6 La
0
Hf
0
Ta
0
W
6
Re
0
Os
3
Ir
3
Pt
1
Au
0
Hg
3
  1. Essential metals are shown in bold font. The data are taken from the February 2007 release of the MERNA database [143, 144], and reflect data from 389 individual RNA-containing structures. Each value represents the number of structures where the indicated transition metal atoms are located within 6 Å from the nearest RNA atom.