The codons with regard to 1st and 2nd bases may be ordered in
4 types with 6 amino acids (ams) in each group, here named:

GA - AG - CU - UC = Form-codons.....Mass sum of ams: 352

GU - UG - CA - AC = Cross-codons....Mass sum of ams: 418 .......Sum
770

GC - CG - AU - UA = RNA-codons.....Mass sum of ams: 412

GG - CC - AA - UU = Pair-codons.......Mass sum of ams: 322 ......Sum
734

Mass sums of the four codon type groups groups as derived from
numbers and mirrored numbers in the dimension chain:

Signs +/- in last step 1-0.

It may be noticed that the two groups with sum 770 grasp over
both numbers forwards and backwards, the other groups not.