KcsA potassium channel, molecular structure

The four levels of structure are illustrated in Fig. 13.30 for the potassium channel KcsA protein [233]. It is quite remarkable that no matter how complicated the molecular structure of proteins is, they can quickly find their natural folded state once they have been synthesized. The way in which proteins fold into their stable structure when they are in their natural environment (aqueous solution of specific pH) remains one of the most intriguing and difficult unsolved problems in molecular biology and has attracted much attention in recent years. 

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