aaextractindex extracts information from the AAINDEX database for use by pepwindow and pepwindowall. AAINDEX is a database containing properties of amino acids. The AAINDEX database file aaindex1 can be downloaded from ftp://ftp.genome.ad.jp/pub/db/genomenet/aaindex/aaindex1.
Here is a sample session with aaindexextract:
% aaindexextract Extract data from AAINDEX Full pathname of file aaindex1: ~/aaindex1