Inter-residue contact matrix



Hi all,
 Is there any free program (executable for SGI Irix 6.5, or Mac OS X) that
 could make a graphical representation of matrix of protein inter-residue
 contacts?
 Thank you and best regards!
 Frangois Sampieri
 ____________________________________________
 UMR 6560 CNRS-Universite de la  Mediterranee
 Laboratoire de Biochimie - IFR Jean Roche
 Faculte de Medecine Nord, Bd Pierre Dramard
 13916 Marseille Cedex 20
 E-mail: sampieri.f..at..jean-roche.univ-mrs.fr
 Tel: (33) 4 91 69 88 44
 Fax: (33) 4 91 65 75 95