Residues at protein surface

[Enrico A. Carrara]

Does anybody have references on studies about surface composition of
proteins (i.e. statistics on the relative frequency of specific
residues appearing at the surface of some protein, hopefully made
on a large subset of the PDB)?

Please answer to me directly, as I not always have a chance to read the
news before they are erased.

Thanks in advance for the attention 

Enrico Carrara
carrara at barbarella.ibf.unige.it