This family consists of MuA-transposase and repressor protein CI. These proteins contain homologous DNA-binding domains at their N-termini which compete for the same DNA site within the Mu bacteriophage genome.

1: Primary structure of phage mu transposase: homology to mu repressor. Harshey RM, Getzoff ED, Baldwin DL, Miller JL, Chaconas G; Proc Natl Acad Sci U S A 1985;82:7676-7680. PMID:2999776

2: NMR structure and functional studies of the Mu repressor DNA-binding domain. Ilangovan U, Wojciak JM, Connolly KM, Clubb RT; Biochemistry 1999;38:8367-8376. PMID:10387082