PAML tree design - (Nov/27/2011 )

I'm new to PAML and phylogenetic analysis in general. I'm running a bunch of alignments through PAML to calculate dN/dS per branch and I need to give it a species tree but I'm not familiar with the parenthetical notation it requires. Can anyone help me out?

The species I'm using are:
Human, Chimp, Orangutan, Gorilla, Mouse, Rhesus Macaque, & Cow

Thanks!

That sounds like the Newick tree format. The Newick format article in Wikipedia provides a good explaination of the format.