The domain within your query sequence starts at position 28 and ends at position 121; the E-value for the APOC4 domain shown below is 9.6e-56.

MSTESLSPTPGPESSRWSLVRARVLEMVEPLVTRTRDRWQWFWGPGAVQGFMQTYYEDHL
KDLGPRTQAWLQSSRDHLLNKTHSLCPRLLCKDR

APOC4

APOC4
PFAM accession number:PF15119
Interpro abstract (IPR028120):

Apolipoprotein C-IV, also known as apolipoprotein C4, may play a role in lipid metabolism [ (PUBMED:10996355) ].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry APOC4