NPSN11 is localized at the cell plate during
cytokinesis. Arabidopsis suspension-cultured cell protoplasts (A, F,
and K) were double immunolabeled with antibodies directed against
α-tubulin (α-tub) to visualize phragmoplast (marked by stars),
cortical microtubules (C, H, and M), and either affinity-purified
NPSN11 (D and I) or KNOLLE antisera (N). Nuclei in dividing and
non-dividing cells were revealed by staining with
4′,6′-diamidino-2-phenylindole (DAPI; B, G, and L). Electronically
merged images of B through D, G through I, and L through N are shown in
E, J, and O, respectively. NSPN11 positive cell plate (solid arrowhead)
and new plasma membrane (empty arrow) are visible in D and I,
respectively. N shows the localization of KNOLLE at the cell plate
(empty arrowhead). Arrows in D and N indicate NSPN11- and
KNOLLE-containing intracellular organelles. Scale bar in A through
O = 10 μm.