Hi friends, There are several protein classification systems, each of them useful in a way! I want to study the thermophilic adaption of an organism at protein sequence & structure level (SEQUENCE & structure COMPARISON). Which of the available "protein groupings" could give better insights? I presume COG classification might be better! Or is it better to select certain type of proteins alone & finish the analysis? Any other suggestions for this study are welcome! If my question is not clear please inform me! Thanks!