Phase contrast of a PtK1 cell (marsupial kidney epithelial cell) injected with Pak1 inhibitory fragment (H83L, 120 uM needle concentration) and X-rhodamine tubulin. Microtubules dynamics in these cell...

Leaves from wildtype Arabidopsis thaliana were fixed, embedded, sectioned, reacted with antibodies to the FtsZ2-1 protein, a prokaryotic cell division protein that is a structural homolog of tubulin. ...

Early transmission electron micrographs showing pore details in negatively stained preparations of nuclear envelopes. Upper panel shows the pronounced 8-fold symmetry in the closely spaced pores of t...