Double - stranded RNA contains how many strands ?
RRM proteins have a variety of RNA binding preferences and functions , and include heterogeneous nuclear ribonucleoproteins ( hnRNPs ) , proteins implicated in regulation of alternative splicing ( SR , U2AF2 , Sxl ) , protein components of small nuclear ribonucleoproteins ( U1 and U2 snRNPs ) , and proteins that regulate RNA stability and translation ( PABP , La , Hu ) .