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← Expanding the Genetic Alphabet May Be Easier Than Previously Thought

kev_s's Avatar Jump to comment 1 by kev_s

It also hints that Evolution's choice of the existing four-letter DNA alphabet -- on this planet -- may have been somewhat arbitrary. "It seems that life could have been based on many other genetic systems," said Romesberg.

I disagree with the idea that it was arbitrary. There must be a good reason why 3.4 billion of years of evolution ended up using only 4 bases. We just don't know it yet.

Tue, 05 Jun 2012 20:05:56 UTC | #945748