Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.
Moderators: honeev, Leonid, amiradm, BioTeam
- Posts: 37
- Joined: Sat Jan 29, 2005 6:19 pm
What property, in a polypeptide. decides wheter its secundary structure is alpha helix or beta pleated sheet?
Thank You, Edher
- Site Admin
- Posts: 974
- Joined: Thu Nov 11, 2004 6:00 am
- Location: Farmville, VA
It's the locations of the Carboxyl and Nitrate groups in the chains. They hydrogen bond to each other and form the structure.
- Posts: 1
- Joined: Tue Oct 10, 2006 11:04 pm
biostudent84 means carboxyl and amino groups (not nitrate). But that doesn't answer the question why a helix rather than a sheet.
- Death Adder
- Posts: 96
- Joined: Sat May 13, 2006 11:20 am
- Location: Sweden
thats a hard question and its not possible to answer diffenatly. Some aminoacids are said to be for an example helical inducers, like leucine and alanine. proline for an example is often found in hairpins. But there is no rule without exceptions so...
- Posts: 131
- Joined: Sun Sep 25, 2005 5:10 am
excess proline can cause kinking enhancing beta pleat formation while more no: of polar amino acids can result in h-bonding(intramolecular) to form alpha helix
Who is online
Users browsing this forum: No registered users and 7 guests