Protecting formulae while still using expand and minimise data gro
 

I have a sheet that has data groups (Data | Group and Outline | Group) that
are used to minimise and maximise the rows shown. I want to protect some
rows from edit, but when I do so the user can no longer use the + and - signs
by the rows that can be expanded.

Is there any way of protecting cells without disabling the maximise/minimise
available via data grouping?

I can provide an example spreadsheet if it helps?

Thanks very much in advance for any help, Dan