Subject: Probe atom in CoMFA Sybyl

From: Antonio Morreale <[email-masked]>
Date: Thu, 3 Jul 1997 15:17:07 -0500 (EST)

Dear CCLers,

In Sybyl, The CoMFA steric field is computed with a carbon sp3 atom. By
default this probe atom has a +1 charge, and I wonder why?. A positively
charged probe makes sense for an electrostatic probe, but why is a +1
necessary for the steric field probe?.

Thanks. 

Antonio.