Today, Hostin, 45, whose mother is Puerto Rican and father is African American, is, for many television viewers, their go-to media analyst for high-profile, complicated legal cases, particularly those with a racial component.
The mRNA is then transported into the cytoplasm where ribosomes assist in their translation into proteins. Finally, these proteins are packaged and sorted in the Golgi apparatus for use in other parts of the cell or in preparation for secretion into other cells.
Nuclear Transport. Chapter 5. After RNA molecules (mRNA, tRNA and rRNA) are produced in the nucleus, they must be exported to the cytoplasm for protein synthesis. On the other hand, many proteins operating in the nucleus must be imported from the cytoplasm. The traffic through the nuclear envelope is mediated by a protein family which can be divided into exportins and importins. Binding of a molecule (a cargo) to exportins facilitates its export to the cytoplasm.