DHOR is a family of di-haem oxidoredictases. It carries the two characteristic Cys-X-Y-Cys-His haem-binding motifs. The C-terminal high-potential site functions as an electron transfer centre, and the N-terminal low-potential site corresponds to the peroxidatic centre. Its probable function is as a peroxidase [1].

1: The challenge of annotating protein sequences: The tale of eight domains of unknown function in Pfam. Goonesekere NC, Shipely K, O'Connor K; Comput Biol Chem. 2010;34:210-214. PMID:20537955