This seems highly likely, especially as it has been shown that in several systems mutations affecting the same amino acid are extremely near together on the genetic map.
Francis CrickThe balance of evidence both from the cell-free system and from the study of mutation, suggests that this does not occur at random, and that triplets coding the same amino acid may well be rather similar.
Francis CrickA good scientist values criticism almost higher than friendship: no, in science criticism is the height and measure of friendship.
Francis CrickBiologists must constantly keep in mind that what they see was not designed, but rather evolved.
Francis Crick