The essential question that fractal dimensions attempt to answer is
about the scales in Nature. For a system as non-idealistic and complex
as a protein, studying scale-invariance becomes particularly important.
Fractal Symmetry of Protein Interior investigates the diverse facets
of the various scales at which we describe protein biophysical and
biochemical phenomena. Following a thorough introduction to fractal
dimensions, fractal-dimension-based approaches, that have been employed
to study protein interior biophysical properties, are described. The
focus is on the question "which scales are scale-invariant?"
Investigations related to scaling of biophysical and biochemical
behaviors may one day help us to formulate a fundamental theory about
protein biophysics; which, in turn, may help us to understand
fundamental principles of proteins.