Template matching results for subunits of CR (light orange, top), IR (green, middle), and NR (blue, bottom) for four NPCs associated with an HIV-1 capsid (surface rendering, pink). For each NPC, a maximum intensity projection of the constrained cross-correlation (CCC) volume with peaks for that ring subunit is shown color-coded (low: blue; high: red). Subunit arrangements are indicated in the right panels.