Gene Expression covers the process of transcription of mRNA genes, the processing of pre-mRNA, and its subsequent translation to result in a protein. The "expression" of non-protein-coding genes is not included in this section yet. However, the transcription of RNAs other than mRNA is described in the section on transcription; in the sections 'RNA Polymerase I Transcription', and 'RNA Polymerase III Transcription'.