Expression of arylphorin begins in the early instar and reaches its maximum level at last instar larval stage.
20E causes the upregulation of arylphorin both at the mRNA and protein levels.
Deletion analysis revealed that − 258 upstream region is sufficient to drive the transcription of arylphorin.
A 19 bp functional Ecdysone Responsive Element in the 5′ upstream region of arylphorin has been identified.