– Final heterodimeric neurohormone released at the end of the molting cycle, involved in the sclerotization (tanning) of the insect cuticle, melanization and wing spreading. Heterodimer specifically activates the G protein-coupled receptor rk. Bursicon Protein, Drosophila melanogaster, Recombinant (GST) is expressed in E. coli expression system with N-GST tag. The predicted molecular weight is 42.5 kDa and the accession number is Q9VD83.