Does Scientific linux and Cent Os supported by Symantec Protection Suite?
I don't think so.........
these are the supported kernel versions for SAV
Release notes for Symantec AntiVirus for Linux 1.0x
http://service1.symantec.com/SUPPORT/ent-security.nsf/ppfdocs/2007864478170998
check the system requirement for linux
http://www.symantec.com/business/support/index?page=content&id=TECH101598&locale=en_US
Not officially supported, however you should be able to install on CentOS and compile the kernel modules for it since it is so close to Redhat. Not sure about Scientific Linux