In this video, we're going to begin our lesson on eukaryotic post-transcriptional regulation. Eukaryotes regulate gene expression at the post-transcriptional level in three different ways that you can see numbered down below: 1, 2, 3. The first way that they regulate their gene expression at the post-transcriptional level after transcription is complete is through alternative RNA splicing. Alternative RNA splicing is going to result in different protein products coming from the same mRNA transcript or the same gene, and we'll talk more about alternative RNA splicing as we move forward.
Now the second level of post-transcriptional regulation in eukaryotes is RNA processing by adding a 5′ prime cap and a poly A tail to the mRNA in order to protect the RNA from degrading enzymes. Again, this is an idea that we'll talk more about moving forward as well.
And then the third level of post-transcriptional regulation in eukaryotes is that the mRNA can actually be tagged for degradation or transcription can be blocked from the mRNA. Transcription of the mRNA can be blocked by small non-coding RNA molecules. We'll talk more about these small non-coding RNA molecules as we move forward as well.
This here concludes our brief introduction to eukaryotic post-transcriptional regulation, and we'll be able to discuss all three of these different levels as we move forward. So, I'll see you all in our next video.