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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 Ã… from the nearest RNA atom.