One β-N-acetylglucosaminidase cDNA sequence was cloned from Mamestra brassicae.
The enzymatic activity was detected after expression in E. coli.
Higher mRNA level was in the prepupal stage, the midguts and salivary glands.
The highest mRNA level occurred 48 h after injection of 20-hydroxyecdysone.
RNAi reduced mRNA level and induced both abnormalities and a high mortality rate.