TerB-C occurs C-terminal of TerB in TerB-N containing proteins. This domain displays multiple conserved acidic residues (TerBC) [1]. The presence of conserved acidic residues in both TerB-N and TerB-C suggests that they, like the TerB domain, might also chelate metals. These two domains may also occur together in the same protein independently of TerB [1].

1: Ter-dependent stress response systems: novel pathways related to metal sensing, production of a nucleoside-like metabolite, and DNA-processing. Anantharaman V, Iyer LM, Aravind L; Mol Biosyst. 2012;8:3142-3165. PMID:23044854