Amino acid relations - alt representations

[mangalam at SALK-SC2.SDSC.EDU]

Saludos,
   Does anyone have refs for alternative representations of the
relationships among amino acids?  ie - is there a more graphical (but still
accurate) way of showing the information in a substitution matrix other
than the usual tabular form?
  Star or ellipsoid diagrams, especially 3-D, come to mind, but I haven't
come up with anything within easy reach. I'll summarize if I get anything. 
Or maybe I'll write a grant ....8).

Thanks for your time.

Harry

Harry Mangalam                                   Vox:(619) 453-4100, x250
Dept of Biocomputing                                   Fax:(619) 552-1546
The Salk Institute                             mangalam at salk-sc2.sdsc.edu
10010 N Torrey Pines Rd                        mangalam at salk-sgi.sdsc.edu
La Jolla CA 92037                                    mangalam at salk.bitnet