Salt bridges are frequently investigated in the context of thermophilic organisms: try this search:

https://scholar.google.ch/scholar?q=thermophilic+proteins+salt+bridges&hl=en&as_sdt=0,5

Hi Maryam

This is a cool paper about molecular evolution of proteins. Check it out... they talk about salt bridges

http://dx.doi.org/10.1016/j.cub.2006.10.063

Be free to continue discussion. Very interesting topic indeed... Probably you should look to classical old papers about protein structure.

Best

Paco

Dear Dr. Francisco,

Thank you very much for your answer. I am gonna start reading the paper you introduced and I will get back here to ask my questions.

Best,