<unk> , more correctly termed heterogeneous nuclear RNA (hnRNA), is an immature single strand of messenger ribonucleic acid <unk> . HnRNA is synthesized from a DNA template in the cell nucleus by a process called transcription.
Once hnRNA has been completely processed, it is termed "mature messenger RNA", "mature<unk> ", or simply "mRNA".
Precursor mRNA
Ribosomal RNA
Non-coding RNA
Protein precursor
Extractable nuclear antigens
Transfer RNA
Open reading frame
Viral envelope