This region is found in plant proteins that are presumed to be the transposases for Mutator transposable elements [1,2]. These transposons contain two ORFs. The molecular function of this region is unknown.

1: Characterization of the major transcripts encoded by the regulatory MuDR transposable element of maize. Hershberger RJ, Benito MI, Hardeman KJ, Warren C, Chandler VL, Walbot V; Genetics 1995;140:1087-1098. PMID:7672579

2: Cloning of the Mutator transposable element MuA2, a putative regulator of somatic mutability of the a1-Mum2 allele in maize. Qin MM, Robertson DS, Ellingboe AH; Genetics 1991;129:845-854. PMID:1661256