  The genetic code is the set of rules by which information encoded in genetic
material (DNA or RNA sequences) is translated into proteins (amino acid
sequences) by living cells. The code defines a mapping between tri-nucleotide
sequences, called codons, and amino acids. Since there are 20 amino acids and
64 possible tri-nucleotide sequences, more than one among these 64 triplets can
code for a single amino acid which incorporates the problem of degeneracy. This
manuscript explains the underlying logic of degeneracy of genetic code based on
a mathematical point of view using a parameter named Impression. Classification
of protein family is also a long standing problem in the field of Bio-chemistry
and Genomics. Proteins belonging to a particular class have some similar
bio-chemical properties which are of utmost importance for new drug design.
Using the same parameter Impression and using graph theoretic properties we
have also devised a new way of classifying a protein family.
