A collection of nuclear pores (top down) from a single tangential section of an hepatocyte nucleus from a mouse +/- for 14CoS (as opposed to the null). These show that about three quarters of the nuclear pores have some kind of transport item (like a pre-ribosome, or something else) being imported or exported all the time.  Just afun look at these adjacent pores. (excuse the morphometry grid from my inkjet printer back in the days when point counting was the method of choice for gathering numerical data from TEM images.

So these from a single cell show something about morphology… and the distance of the heterochromatin exclusion area surrounding the pore and the inter-pore distance and the size of the chromatin “beads on a string” in the adjacent chromatin I posted before.