This family includes proteins with sequence similarity to the RepB partitioning protein of the large Ti (tumour-inducing) plasmids of Agrobacterium tumefaciens[1-2].

1: The replicator of the nopaline-type Ti plasmid pTiC58 is a member of the repABC family and is influenced by the TraR-dependent quorum-sensing regulatory system. Li PL, Farrand SK; J Bacteriol 2000;182:179-188. PMID:10613878

2: Novel structural difference between nopaline- and octopine-type trbJ genes: construction of genetic and physical map and sequencing of trb/traI and rep gene clusters of a new Ti plasmid pTi-SAKURA. Suzuki K, Ohta N, Hattori Y, Uraji M, Kato A, Yoshida K; Biochim Biophys Acta 1998;1396:1-7. PMID:9524202