The TraH protein is thought to be a relaxosome accessory component, also necessary for transfer but not for H-pilus synthesis within the conjugative transposon [2] [3].

1: Nucleotide sequence of the F plasmid transfer gene, traH: identification of a new gene and a promoter within the transfer operon. Ham LM, Firth N, Skurray R; Gene 1989;75:157-165. PMID:2656408

2: Functional and mutational analysis of conjugative transfer region 1 (Tra1) from the IncHI1 plasmid R27. Lawley TD, Gilmour MW, Gunton JE, Standeven LJ, Taylor DE; J Bacteriol. 2002;184:2173-2180. PMID:11914349

3: Characterization, localization, and sequence of F transfer region products: the pilus assembly gene product TraW and a new product, TrbI. Maneewannakul S, Maneewannakul K, Ippen-Ihler K; J Bacteriol. 1992;174:5567-5574. PMID:1355084