The rationale of the plone4bio project is to provide an integrated environment where it is possible to manage and analyze sequences of proteome or genome.
The plone4bio package provides the possibility to add a new content type, called sequence, than can be either written by hand or imported from a FASTA file, and to apply to that sequence a program, called predictor, that analizes the sequence and gives back a plot highlighting the portions having the required property.
A predictor can try to assess if a protein sequence is trans-membrane, whether a signal peptide exists, and so on.

Everyone interested in plone4bio will also get an example predictor, biocomp.pscoils, incapulating the pscoil algorithm by Fariselli et al. available at http://www.biocomp.unibo.it/ It is intended both as an example on how to integrate one's own predictor in the plone4bio framework and as a predictor for coil-coil ready to be used.