Fig. 4. Pkc1p is required for the maintenance of Ca2+-induced polarized bud growth. The zds1
(YMM187) and zds1
pkc1-834 (YMM178) strains was grown in YPD medium to early-log phase at 25°C. The cells were synchronized in G1 with
-factor and then released into YPD medium with or without 100 mM CaCl2 at 25°C. Samples were taken at 20-minute intervals after removal of
-factor and fixed with formaldehyde. (A) F-actin staining with Rhodamine-phalloidin. (B) The cumulative percentage of cells that initiated bud formation (left) or the percentage of F-actin patches localized at the incipient bud site (right; actin patches localized at the second-cycle buds were excluded) is plotted for the same samples shown in A.