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Generate random sequence variants for directed-evolution libraries and robustness testing. These tools fill chosen positions with random residues drawn from configurable schemes, using standard nucleotide substitution rules for DNA and codon-based sampling for proteins. They provide a model-free baseline for exploring sequence space.
  • Input: a starting sequence and the positions to vary (or a target mutation rate).
  • Output: a library of randomized sequence variants drawn from the chosen substitution scheme.