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    STUDIA PHYSICA - Issue no. SPECIAL ISSUE / 2001  

  Abstract:  Many spatial and temporal processes and phenomena in Nature have fractal characteristics. They have been noticed from molecular to Universe levels and represents a face of the complexity. A closely investigated subject was the fractal aspects of protein structure (1). Proteins are three dimensional structures of which is dictated by their aminoacid sequence. Because of the compact structure of most proteins amino acid residues that are at distant points in the sequence can be in close proximity in the folded state. They may interact by various type of physical forces which cause long-range interactions and finally the 3D structure of the molecule. Proteins have an intrinsic self-similarity with regard to the compactness and packing of their structures and this results in a simple form of fractal behavior.  
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