▁that ▁in ▁humans ▁is ▁encoded ▁by ▁the ▁M IR 2 2 3 ▁gene . ▁ ▁Function ▁ ▁micro R N As ▁( mi R N As ) ▁are ▁short ▁( 2 0 - 2 4 ▁n t ) ▁non - c oding ▁R N As ▁that ▁are ▁involved ▁in ▁post - trans cription al ▁reg ulation ▁of ▁gene ▁expression ▁in ▁mult ic ell ular ▁organ isms ▁by ▁affect ing ▁both ▁the ▁stability ▁and ▁translation ▁of ▁m R N As . ▁mi R N As ▁are ▁trans cribed ▁by ▁R NA ▁polym er ase ▁II ▁as ▁part ▁of ▁c apped ▁and ▁poly aden yl ated ▁primary ▁trans cript s ▁( p ri - mi R N As ) ▁that ▁can ▁be ▁either ▁protein - c oding ▁or ▁non - c oding . ▁The ▁primary ▁trans cript ▁is ▁cle aved ▁by ▁the ▁Dro sha ▁rib on uc lease ▁III ▁en zym e ▁to ▁produce ▁an ▁approximately ▁ 7 0 - nt ▁stem - loop ▁prec ursor ▁mi R NA ▁( pre - mi R NA ), ▁which ▁is ▁further ▁cle aved ▁by ▁the ▁cy top las mic ▁Dic er ▁rib on uc lease ▁to ▁generate ▁the ▁m ature ▁mi R NA ▁and ▁ant is ense ▁mi R NA ▁star ▁( mi R NA *) ▁products . ▁The ▁m ature ▁mi R NA ▁is ▁incorpor ated ▁into ▁a ▁R NA - indu ced ▁sil encing ▁complex ▁( R IS C ), ▁which ▁recogn izes ▁target ▁m R N As ▁through ▁imper fect ▁base ▁pair ing ▁with