Conformation of X

Chain of six-membered rings (chair conformation) as found in BaPg and AU2P3. (e) Chain of six-membered rings (boat conformation, 1,2 connection) from MoFe2Pi2- (f) Branched (P ) from RuPs. (g) Branched (P ) from RePs. (h) Different conformations of (X ) chains with their torsion angles and their projections along the helix axes, (i) Infinite and finite chains with n = 3, 4, 5, 6, and 8... 

To elucidate the functions of natural proteins and, for instance, to design artificial proteins with improved or new functions, the relation between the amino-aeid sequence and the conformation must fully be understood. The ultimate goal to be achieved is to develop a reliable approach that allows us to predict conformations of proteins from their amino-acid sequences. A theoretical method of investigating the proteinfolding problem may fall into three major categories. One of them is based on very simplified models (the so-called minimal models) of protein systems [3, 4, 5]. The second one utilizes the prediction from alignment of conformations of X-ray crystallographic data [6]. The third one employs... 

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