[EMBOSS] lit. references for EMBOSS data files, e.g. Epk.dat (iep usage)

[WulfDirk.Leuschner at sanofi-aventis.com]

Hi all, 
I was wondering whether someone might know something about how some of
the meta data used in EMBOSS were compiled. A colleague of mine was
looking for a reference for the Epk.dat values used for the
determination of the isoelectric point of a protein. However, neither
she nor I could find anything... Any hints?
Wulf Dirk Leuschner