Tag Archives: DNA

Chemlambda quines and DNA pairs, speculation

I’m staring at this space view of the walking machine described first in this post:

walker_space_step0

The picture is a screenshot of the chemlambda gui available for download from this page.

The .mol file of the walker is available at this link.

What is this: is a walker as described in the ouroboros predecessor post, which walks on a train track generated by a y combinator pair A-FOE.

But the strange thing which makes me stare at the picture is that I see a hexagonal structure connected to a quadrilateral one, or I recall that I have seen such structures, see for example the following crop from this source.

nitro_basesSo it’s like the thymine-adenine pair (well, there is no pure adenine side, is only half of it).

Then, I recall seeing all these structures before with the space view, including the one representing the connection between guanine and cytosine, but I have to look at the files to recover them (I have plenty of mol files already, hundreds, I need to classify all the interesting stuff I learned).

Is this a coincidence or not? I don’t know, it is tempting to make the connection between quines in chemlambda, as it is the ouroboros, and self-mantaining molecules like DNA.

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Fresh brain with no thoughts, yet

I just like his picture obtained with chemlambda

fineuron2

because it gives many ideas, among them the following:

  • if multiplication (reproduction) is Nature’s way to do a fanout
  • and if a brain (and actually the whole organism) grows from a small seed
  • then it must be that we may think about a brain as having one neuron (self-multiplied according to the needs of the computation).

Ergo, the physical brain we see is the concrete embodiment of an universal computing seed, taking physical shape according to physical constraints.

That’s why I like this picture, because it gives ideas.

Here is the first realisation of a (mutant) Turing neuron  in chemlambda

which can be seen as a continuation of the old, but open thread which started with this teaser and continued up to this post on B type neurons.

UPDATE: compare with

which uses the same mechanism for another purpose, the one of assembling a DNA like tape.

I know people hate seeing two ideas in the same post, but here is the second one:

  • at different scales, the same mechanism:
  • be it about the DNA, RNA and proteins in a cell or
  • be it about the chemical connectome of a brain.

If you combine the two ideas from this post, what gives?

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