Fig. 2. GSK-3 is phosphorylated during mitosis and accumulates at centrosomes and
spindle poles. (A) GSK-3 phosphorylation increases during mitosis. Total HeLa
cell lysates were probed using antibodies against GSK-3ß and
Phospho-GSK-3
/ß (Ser21/9). S, stimulated HeLa cells (see Materials
and Methods); U, unsynchronised, unstimulated HeLa cells; M, mitotic HeLa
cells. (B) HeLa cells stained for Phospho-GSK-3
/ß (Ser21/9) and
DNA. (C) HeLa cell stained for Phospho-GSK-3
/ß (Ser21/9), total
GSK-3 and DNA. (D) Localisation of phospho-GSK-3 and
-tubulin in HeLa
cells treated with 1 µM nocodazole for 2 hours. Bar, 10 µm.