【摘 要】
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Dear Editor,The maize Mutator (MuDRIMu) transposon family is the most active DNA transposon in plants (Lisch,2002).The Mu family contains diverse elements,all s
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Centro de Estudios Fotosintéticos y Bioquímicos(CEFOBI), Universidad Nacional de Rosario, Rosario, A
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Dear Editor,The maize Mutator (MuDRIMu) transposon family is the most active DNA transposon in plants (Lisch,2002).The Mu family contains diverse elements,all sharing similar ～215-bp terminal inverted repeats (TIRs).MuDR is the autonomous element,and a transcriptionally active MuDR is required for transposition of the non-autonomous Mu elements (Chomet et al.,1991).MuDR contains two genes,mudrA and mudrB (Figure 1A);mudrA encodes the MURA transposase,and mudrB encodes a protein with unknown function.To avoid the deleterious effects of transposons,plants have acquired mechanisms to epigenetically silence them.
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