The Railway Analogy of DNA


These illustrations will be found in smaller black and white pictures embedded in the text of the book.  Here readers can explore them in full colour by the artist, Mark Salwowski, so the simplicity and grandeur of the structures can be readily appreciated. Here you can see the railway analogy of DNA, with the two rails on the left made up of alternating stars and pentagons and the code (which has already replicated) in the sleepers.  You can also see the weak hydrogen bonds holding the complementary nucleotides (half sleepers) together, always C with G and T with A, and vice versa.  Thus the equivalent of just six pieces of chemical Lego (molecules) make up the wonder chemical of life: 



 Click here to go to the

modern DNA breakdown of the entire nuclear Human Genome.