[Characteristics of distribution of nonpolar amino acid residues in amino acid sequences of different groups of globular proteins].

A method for quantitative characterization of nonpolar residue distribution in amino acid sequences of different groups of globular proteins related to two amino acid subgroups: leucine, phenylalanine, tyrosine, tryptophan; and alanine, valine and isoleucine, has been developed. The value of proposed index for analyzed molecules of myoglobins are within the range of 0.65-1.35, those for cytochromes c are 1.00-1.37, for RNAases are 0.51-1.32, while the mean values for each protein group approximate unity.