LE 4: Transcriptoinal control of gene expression III - Chromatin
3 important questions on LE 4: Transcriptoinal control of gene expression III - Chromatin
What is the effect of modifications of the histone tail of the nucleosome?
Major change in chromatin state, acetylaton decreases interaction with DNA, trimethylation can lead to chromatin compaction
What is the process of heterochromatin formation at chromosome ends of S. Cerevisiae? (4 steps)
1. Rap1 recruits Sir3 and 4
2. Tehtering of Sir3 and 4 recruits Sir2
3. Sir2 deacetylates adjacent histone tails
4. Deacetylated histone tails recruit more Sir3 and 4 and contribute to spreading
2. Tehtering of Sir3 and 4 recruits Sir2
3. Sir2 deacetylates adjacent histone tails
4. Deacetylated histone tails recruit more Sir3 and 4 and contribute to spreading
What is the process of heterochromatin formation at chromosome ends of S. Pombe? (3 steps)
1. Suv39 trimethylates histone pairs
2. HP1 binds to the mehtyl groups
3. HP1 oligomerizes this leads to chromatin compaction
2. HP1 binds to the mehtyl groups
3. HP1 oligomerizes this leads to chromatin compaction
Try our study magic for free
a PDF, study it super fast
- No sign up, email or credit card needed!
- AI makes unlimited flashcards
- Get unlimited quizzes and tests
- Ask AI anything
Create a notebook
- No sign up, email or credit card needed!
- Have and keep perfect overview
- Make flashcards, notes and mind maps
- Review, test and score!
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
