Background: Synonymous codon usage affects protein properties in a given organism. Results: A total of 342 antibody codon variants were identified, differing significantly in solubility and functionality while retaining the identical original amino acid sequence. Conclusion: Genetic codes control protein synthesis and folding. "Codon-preferred" DNA template(s) can be generated by functional screening. Significance: Protein properties can be considerably altered by synonymous codons without substituting amino acids.
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