program below will calculate the average hydrophobicity
(Kyte-Doolittle values), the average hydrophobic moment
(Kyte-Doolittle values with Eisenberg equation), and
the average propensity for alpha-helix formation (Chou-Fasman
the peptide sequence in single-letter residue format.
This program takes up to 60 characters at once. All
invalid characters will be removed. The program does
not recognize three-letter residue names (eg. Ile,