misincorporation
/ˌmɪsɪnˌkɔːpəˈreɪʃn/ /ˌmɪsɪŋˌkɔːpəˈreɪʃn/Molecular Biol.
noun
The incorporation into a protein, nucleic acid, or other biological polymer of a residue that differs from the one normally found at a given position; an instance of this.
Origin
1960s; earliest use found in Proceedings of the National Academy of Sciences of the United States of America. From mis- + incorporation.