[PyMOL] Selecting Negative Residues

[Buz Barstow]

Dear All,

Does anyone know how to select residues with negative sequence numbers  
in Pymol?

I have a protein molecule with two residues with negative sequence  
numbers (-2 and -1). When I issue the command:

cmd.select('temp', 'resi -2 and name CA')

Pymol selects the alpha carbons of residues -2 to +2.

How can I tell Pymol that I don't want to select a range?

Thanks, and all the best,

--Buz