Fedoroff N, Masson P, Banks J A
Bioessays. 1989 May;10(5):139-44. doi: 10.1002/bies.950100502.
Information about the structure, function and regulation of the maize Suppressor-mutator (Spm) transposable element has emerged from the genetic and molecular characterization of both deletion mutations and an unconventional type of reversible genetic change (epimutation). The element is subject to an epigenetic mechanism that can either stably inactivate it or specify one of a variety of heritable programs of differential element expression in development. The essay explores the relationship between the Spm element's epigenetic developmental programming mechanism and the determinative events central to plant development and differentiation.
关于玉米抑制突变体（Spm）转座元件的结构、功能及调控的信息，来自对缺失突变以及一种非常规类型的可逆遗传变化（表观突变）的遗传和分子特征分析。该元件受一种表观遗传机制的影响，这种机制既能使其稳定失活，也能在发育过程中指定多种不同元件表达的可遗传程序中的一种。本文探讨了Spm元件的表观遗传发育编程机制与植物发育和分化核心的决定性事件之间的关系。
