- 07-09-2008, 02:37 PM
- 07-15-2008, 12:20 PM
- 07-17-2008, 12:01 AM
07-18-2008, 01:41 PM
07-20-2008, 09:42 PM
08-08-2008, 04:01 AM
08-08-2008, 05:33 AM
I've read protein diluted with water lose effectiveness with time.
Anybody knows it that is true or not?
08-10-2008, 11:35 PM
08-18-2008, 01:47 PM
Denaturation is when a protein loses its native conformation. For example, egg white (also called albumen) contains a protein called albumin which is water-soluble. However, if heated, albumin becomes denatured and loses its ability to be water-soluble. There are several possible things that can denature proteins including changing the temperature (adding heat), changing the pH or salt concentration of the solution, or putting the protein into a hydrophobic solvent. In a hydrophobic solvent, the amino acids with hydrophobic side chains (the yellow beads) would all try to go to the outside of the molecule, and all those with hydrophilic side chains would cluster in the center of the molecule. If a protein remains water-soluble when denatured (unlike albumin), it can return to its native conformation if/when placed back into a “normal” environment.
08-18-2008, 04:41 PM
10-13-2008, 04:33 AM
10-14-2008, 01:18 PM
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