Statistical parameters of nucleotide sequences of mature human RNAs an
d those of human viruses were compared. The redundancy values of the a
ppropriate genes were compared. The redundancy of virus genes was show
n to be, on the average, less than that of human genes. The distributi
on of human genes according to redundancy values is bimodal, and that
of human virus gene's is trimodal. This fact suggests possibility of a
novel gene classification according to statistical characteristics of
nucleotide sequences.