TGD based model of tqc relies on colored braids with the color of braid in one-one correspondence with nucleotides A,T,C,G and represented by 2 quarks and 2 anti-quarks. The basic prediction of the braid concept is anomalous em charge defined as the net quark charge assignable to DNA space-time sheets of DNA sequence. This notion makes sense also for more general molecules possessing braids. Transposons provide an especially simple manner to test the hypothesis that anomalous em charge is integer valued (quarks can form color singlet) or even vanishing (by stability).
Transposons (see this and the article of D. F. Voytas (2008), Fighting fire with fire, Nature vol 451, January) are moving and copying genes. Moving genes cut from initial position and past to another position of double strand. Copying genes copy themselves first to RNA and them to a full DNA sequence which is then glued to the double strand by cut and paste procedure. They were earlier regarded as mere parasites but now it is known that their transcription is activated under stress situations so that they help DNA to evolve. In tqc picture their function would be to modify tqc hardware. For copying transposons the cutting of DNA strand occurs usually at different points for DNA and cDNA so that "sticky ends" result ("overhang" and its complement) (see ). Often the overhang has four nucleotides. The copied transposon have ends which are reversed conjugates of each other so that transposons are palindromes as are also DNA hairpins. This is suggestive of the origin of transposons./p>
In order to avoid boring repetitions let us denote by "satisfy P" for having having integer valued (or even vanishing) Qa. The predictions are following:
It is known that transposons - repeating regions itself - tend to attach to the repeating regions of DNA.
AT and CG have vanishing Qa so that their presence in LINEs and SINEs would make the cutting and pasting easy allowing to understand why transposons favor these regions. Viruses are known to contain long repeating terminal sequences (LTR). One could also check whether DNA decomposes to regions satisfying P and surrounded by repeating sequences which satisfy P separately or as whole as in the case DNA transposons.
For a more detailed exposition and background see the chapter DNA as Topological Quantum Computer.