Like the Sm ring , it is assembled in the cytoplasm onto the U7 snRNA by a specialized SMN complex .
The U7 snRNP mediates processing of the 3 ' UTR stem - loop of the histone mRNA in the nucleus .
Like the Sm ring , U7 snRNP is assembled in the cytoplasm onto the U7 snRNA by a specialized SMN complex .
The U7 snRNP mediates processing of the 3 ' UTR stem - loop of the histone mRNA in the nucleus .