%0 Journal Article %T Amino acid classes and the protein folding problem %A Marek Cieplak %A Neal S. Holter %A Amos Maritan %A Jayanth R. Banavar %J Quantitative Biology %D 2000 %I arXiv %R 10.1063/1.1333025 %X We present and implement a distance-based clustering of amino acids within the framework of a statistically derived interaction matrix and show that the resulting groups faithfully reproduce, for well-designed sequences, thermodynamic stability in and kinetic accessibility to the native state. A simple interpretation of the groups is obtained by eigenanalysis of the interaction matrix. %U http://arxiv.org/abs/cond-mat/0010244v1