pore if they are accompanied by a signaling molecule that temporarily interacts with a nucleoporin's FG repeat segment. FG nucleoporins also contain a globular portion that serves as an anchor for attachment to the nuclear pore complex.

Membrane nucleoporins associate with both the scaffold and the nuclear membrane. Some of them, like GP210, cross the entire membrane, others (like NUP98) act like nails with structural parts for the lining as well as parts that punch