The domain within your query sequence starts at position 1 and ends at position 135; the E-value for the NDUF_B5 domain shown below is 8.4e-69.

TALSCRRAGPRLGVGSFLTRSFPKTVAPVRHSGDHGKRLFVVKPSLYYDARFLRLMKFYL
MLTGIPVIIGITLVNIFIGEAELAEIPEGYIPEHWEYYKHPISRWIARNFYDGPEKNYEK
TLAILQIESEKAELR

NDUF_B5

NDUF_B5
PFAM accession number:PF09781
Interpro abstract (IPR019173):

Members of this family mediate the transfer of electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone, the reaction that occurs being: NADH + ubiquinone = NAD(+) + ubiquinol [(PUBMED:16828987), (PUBMED:9425316)].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry NDUF_B5