CYP4 mRNA expression in marine polychaete Perinereis aibuhitensis in response to petroleum hydrocarbon and deltamethrin

► The complete cDNA of CYP4 in P. aibuhitensis is 1857 bp encoding 481 amino acids. ► The deduced protein sequence shares high homology to other known CYP4 sequences. ► PH and DM exposure increase the mRNA expression of PaCYP4.