Figure 4.

Mitosis Transition Times and Observation Times.

(A) Dividing cells injected with KCBP-Ab.

(B) Dividing cells injected with preimmune serum.

In both (A) and (B), the microinjections are ordered according to the length of time spent in a mitotic phase after injection at time 0. Observations >140 min were cut off. Each bar represents the observation time (not necessarily the beginning and end of a mitotic phase), except for the bars representing interphase, which were continued to show the observed completion of cell division. Clearly visible are the differences in the lengths of prophase and metaphase and the variation in the length of telophase between KCBP-Ab–injected cells and their controls. Prophase is indicated with black bars; metaphase with striped (\) bars; anaphase with stippled bars; telophase with striped (//) bars; and interphase with open bars.