Complex sentence: This sequence mediates transcriptional termination by providing signals in the newly synthesized mRNA that trigger processes to release the mRNA from the transcriptional complex which can be mediated by the direct activity of the mRNA secondary structure and/or by the indirect activities of recruited termination factors.
Split into simpler sentences: This sequence mediates transcriptional termination by providing signals in the newly synthesized mRNA that trigger processes which release the mRNA from the transcriptional complex. These processes include the direct interaction of the mRNA secondary structure with the complex and/or the indirect activities of recruited termination factors.