Here, in Vignesh's own words, is a quick rundown on what it represents...
The rigid drum rhythm represents the nigh-mechanical nature of the DNA
replication process.
The two piano melodies at the beginning together represent the spiraling
double helix of DNA.
The harsh, distorted part represents the helicase breaking up the double
strand.
Afterward, the organ chords represent the the RNA primer.
The legato layered piano represents the leading strand from 5' to 3'.
Then, the staccato piano and the slower, somewhat arrhythmic drum beat
represent the "fragmented" lagging strand from 3' to 5'. This part is
more repetitive as the process is more repetitive.
The two piano melodies come back, but in stereo and with different
timbres, to represent two DNA helices, the products of semiconservative
DNA replication.
The second piece, submitted by Paul (CO 2011) is described as follows:
At the beginning, nothing is happening to the DNA. Then helicase separates it with staccato dissonance. Binding proteins are a sustained, rising melody. (We modulate down 1 half step to E flat. E natural represents completed DNA. Primase gets everything started on the leading strand with 3 sharp chords, and then polymerase 3 makes some chords as the rapid notes are the new strand of DNA forming. An E natural chord indicates that the strand of DNA has formed. Primase then starts the lagging strand (same 3 chords) and Okazaki fragments are formed as polymerase 3 makes more chords (back to E flat here). Ligase smoothly joins the Okazaki fragments with arpeggios. At the end, it resolves on E because the DNA has finished replicating.
Thanks to Veronica for sending me this for submission.
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