雙鏈（ds）RNA特異性內核糖核酸酶III超家族成員參與真核細胞和原核細胞的多種RNA成熟和衰變途徑（Fortin等人，2002[PubMed 12191433]）。RNase III Drosha是核心核酸酶，執行細胞核中microRNA（microRNA）處理的起始步驟（Lee等人，2003[PubMed 14508493]）。
Members of the ribonuclease III superfamily of double-stranded (ds) RNA-specific endoribonucleases participate in diverse RNA maturation and decay pathways in eukaryotic and prokaryotic cells (Fortin et al., 2002 [PubMed 12191433]). The RNase III Drosha is the core nuclease that executes the initiation step of microRNA (miRNA) processing in the nucleus (Lee et al., 2003 [PubMed 14508493]).