Extended Data Fig. 10: Measurement diagram of the relative position of pre-60S particles in the NPC.
From: Nuclear export of pre-60S particles through the nuclear pore complex

d1 represents the projection distance between the center of NPC and the center of pre-60S in the micrograph, d2 is the projection of d1 on the symmetry axis of NPC, that is, the distance from the center of pre-60S to the equatorial plane of NPC, and d3 is the distance from the center of pre-60S to the symmetry axis of NPC.