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> You can vary the voltage (a bit) and polarity. Maybe the steepness of the voltage gradient.

But that's literally all that you need, isn't it? I understood the whole thing about Levin's bio-electric fields is this: it's a "global" signal that lets cells know where they are in the target structure that's not uniformly symmetric. It's not the full structure description, just lowest-frequency view - head is here, tail is there, etc.

Also I thought that was experimentally confirmed.



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