Looking at /usr/sbin/chkfontpath on my system - it looks like the ttf fonts that ship with Fedora have not been added.
That would make them unavailable to apps that don't use fontconfig, but that's only a handful of apps commonly used (I believe including emacs)
What is the output of /usr/sbin/chkfontpath --list on your system? On mine it is:
Current directories in font path: 1: /usr/X11R6/lib/X11/fonts/misc:unscaled 2: /usr/X11R6/lib/X11/fonts/75dpi:unscaled 3: /usr/X11R6/lib/X11/fonts/100dpi:unscaled 4: /usr/X11R6/lib/X11/fonts/Type1 5: /usr/X11R6/lib/X11/fonts/Speedo 6: /usr/share/fonts/default/Type1 7: /usr/share/fonts/coreweb 8:
I'm not sure why there is an empty space a 8:
