Stylus: A System for Evolutionary Experimentation Based on a Protein/Proteome Model with Non-Arbitrary Functional Constraints
A) The set of vector monomers, named according to compass direction and length (i.e., Nem indicating a northeast vector of medium length). To ensure that vector addition produces different results with different vector combinations, small vectors are of length 1, medium vectors of length e1/2 (≈1.65), and long vectors of length e (≈2.72). B) A standard genetic code for specifying the monomers with nucleotide triplets. Like the natural code  this code incorporates several features that reduce the impact of point mutations. These include extensive use of third-position degeneracy, strong correlation of second position with a key physical property (direction), and underrepresentation of vectors that would be most disruptive as substitutes (long vectors).