Enzimski kompleks se sastoji od tri različite podjedinice: RecB, RecC, i RecD i stoga se kompleks naziva RecBCD. Pre otkrića recD gena,[3] ovaj enzim je bio poznat kao RecBC. Svaka podjedinica je kodirana zasebnim genom:
↑ 1,01,1Singleton MR, Dillingham MS, Gaudier M, Kowalczykowski SC, Wigley DB (November 2004). „Crystal structure of RecBCD enzyme reveals a machine for processing DNA breaks”. Nature432 (7014): 187–93. DOI:10.1038/nature02988. PMID15538360.
↑Spies M, Kowalczykowski SC (2003). „Homologous recombination by RecBCD and RecF pathways”. u: Higgins P. Bacterial Chromosomes. Washington, D.C: ASM Press. str. 389–403. ISBN1-55581-232-5.