14. 3rd base grouping of codons
1) For 24 amino acids we have an 8-8-8- division:
2) Number of ams seen in an orbital series:
In G+C-groups, 10 ams: 6 of them 2-base-coded* ~
d --> p-orbitals
In U+A-groups, 14 ams: 2 of them 2-base-coded *~ f -->
*GG+CC+GC+CG, + GU+CU (R total 159 + 100 = 259)
* AC+UC (R total = 76)
A doubling of the "2-base"-coded ams gives 32 ams, as
disintegrated into steps
"2-base"-coded as separated off
outwards in the chain (as the higher f-orbital in heavy atoms could
be thought of as disintegrating into s- and p-electrons before the
f2-orbital gets any electrons in the periodic system).
3) Z-N-numbers of the 2,5-3-base-coded ams:
The division on Z and N in the groups with 3rd base U/C and A/G(A,G)
is the same as between the codon types: 638 Z - 531 N, see about
number divisions along different "polarities".
© Åsa Wohlin:
Free to distribute if the source is mentioned.
Texts are mostly extractions from a booklet series, made publicly available
in year 2000.
Links and Notes
To the background
24 ams A, Z, N
- ways of writing -
as one document, pdf