A transposable element that has lost the transposase function and can move only when this function is provided by a helper element. A nonautonomous controlling element is Ds or Spm of maize whereas the helper element may be Ac and Spm, respectively (see Fig. N36). transposable elements, Ac-Ds , Spm ; McClintock B 1955 Brookhaven Symp Biol 8:58; McClintock B 1965 Brookhaven Symp Biol 18:162.
Active Spm transposase (top maize kernels) and inactive transposase (bottom endosperms) in either solid deeply colored (A) or inactivated (a-m1) states. (Courtesy of Barbara McClintock)
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(2008). Nonautonomous Controlling Element. In: Encyclopedia of Genetics, Genomics, Proteomics and Informatics. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6754-9_11484
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DOI: https://doi.org/10.1007/978-1-4020-6754-9_11484
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