Some years back I was very impressed by an observation in a book called The I Ching and the Genetic Code by Dr. Martin Schönberger (unfortunately I loaned it out many years ago and never got it back - moral, don't loan you books!), pointing out the correlation between the 64 kua and the nucleotide sequence and amino acid bases in the RNA/DNA molocule. Since then this association has appeared a number of times, most recently on the Net. As Tony Smith points out, this shows that the genetic code, the I Ching, and the D4-D5-E6 physics model are all just different representations of the same fundamental structure.
There are actually on the Internet a number of different correlations assigning the I Ching bigrams and hexagrams with the nucleotide bases. Different authors use different assignments to bases and numbers (6,7,8,9). One of these - provides an explanation (http://www.sipp.org/reference/sipp6/) He also says that he was first inspired by the same book by Dr. Martin Schönberger that got me thinking about the I Ching and DNA.
Another assignment is the one used by Chris Lofting of I Ching plus who gives a detailed discussion. Still other correlations can be found.
It is rather disappointing that there is no agreement on this matter. Arvan Harvat goes so far as to suggest that no such exact equivalence is possible.
I Ching (Ho Tu and Lo Shu), Genetic Code, Tai Hsuan Ching, and the D4-D5-E6-E7 Model - by Tony Smith
Amino acid positioning on the I Ching Matrix - a coloured html table matching the amino acids and hexagrams. Also DNA Codons and Amino Acids in three dimensional view, DNA codons, amino acids, biological building elements - both from The Structure of the Interactive Psycho Philosophy (SIPP). This amazing project attempts to align "the Mayan tzolkin and haab calendars, the Moon Phase and the Long Count Time Pulses", with the Sipp/I Ching, itself a combination of DNA, the I Ching, the Tarot, the Kabbalah and the Eight paths to Enlightment in a single interface.
THE HEXAGRAMS (KUA) ARE ASSIGNED TO THE GENETIC CODE CODONS
- Matches the four DNA codons with the four "bigrams" of the I Ching system.
The I Ching Binary System And Natural Phenomena by Stanley Tomshinsky - Analogies with DNA and RNA sequences, conceptual numbers and matrix building.
The I Ching, Wholes, Aspects, and the Genetic Code