Search found 7 matches

by fluciano
Fri Sep 16, 2016 10:00 pm
Forum: Molecular Biology
Topic: Telomeres replication?
Replies: 2
Views: 3082

Telomeres replication?

Hello everybody. I found difficulty in understanding the problem of telomers replication. In particular, every molecular biology book explains that there is a problem with replication of 3' of the template DNA for the lagging strand because the very extremity is occupied by the first RNA primer and ...
by fluciano
Fri Sep 09, 2016 9:56 am
Forum: Cell Biology
Topic: Cellular homeostasis
Replies: 2
Views: 2958

Some exeamples coming to my mind: 1. selective membrane transport of inorganic Ions to keep steady electrochemical gradient. 2. selective transport of nutrients through cell membrane 3. autophagic fenomenoms in order to contrast lack of nutrients 4. changes in chemical composition of cell membrane (...
by fluciano
Thu Sep 08, 2016 4:10 pm
Forum: Cell Biology
Topic: Cells of the human vein
Replies: 3
Views: 3661

I didn't understand if you are looking for a morphological / hystological description of the veins,in that case this could be helpful

http://www.histology.leeds.ac.uk/circulatory/veins.php
by fluciano
Thu Sep 08, 2016 10:36 am
Forum: Cell Biology
Topic: Non coated vescicles
Replies: 0
Views: 2070

Non coated vescicles

Hello everybody. I'm studying vescicular transport in eukaryotic cells and it seems like in vescicular pathways every vescicle buds as a coated vescicle and then loses its proteic coating. My question is: is there some vescicular pathway or any other circumstance when a vescicle can form without bei...
by fluciano
Fri Aug 26, 2016 9:19 am
Forum: Molecular Biology
Topic: DNA supercoiling
Replies: 5
Views: 3706

Thank you so much, in case I found a clear answer about gyrase I'll write it here.

Have a nice day.

Francesco
by fluciano
Thu Aug 25, 2016 3:36 pm
Forum: Molecular Biology
Topic: DNA supercoiling
Replies: 5
Views: 3706

Thank you so much, you were really clear and helpful!

The only point which is not coherent to my notions is the role of gyrase: I know that it is different from other topoisomerases since it introduces new supercoils; in fact, it is ATP dependent.

Do you think my interpretation could be right?

http://www.ncbi.nlm.nih.gov/pubmed/1657531
by fluciano
Thu Aug 25, 2016 10:37 am
Forum: Molecular Biology
Topic: DNA supercoiling
Replies: 5
Views: 3706

DNA supercoiling

Hello, I find difficulties in understanding DNA supercoiling. In particular: 1. I found clear explanations about supercoiling in Prokaryotes: because of their covalently closed circular DNA, it acts as if the DNA molecule had two fixed extremities (I found this video really useful. m ) But talking a...