NinG or Rap is involved in recombination. Rap (recombination adept with plasmid) increases lambda-by-plasmid recombination catalysed by Escherichia coli's RecBCD pathway [1].

1: Gene products encoded in the ninR region of phage lambda participate in Red-mediated recombination. Tarkowski TA, Mooney D, Thomason LC, Stahl FW; Genes Cells 2002;7:351-363. PMID:11952832