Table 2. Cell length at division of S. pombe ypa and ppa mutants.

	Cell length (μm)
Strain	32°	19°
Wild type	15.8 ± 0.8	14.1 ± 1.1
ppa1−Δ	13.4 ± 0.7	13.1 ± 1.0
ppa2−Δ	10.1 ± 1.4	11.8 ± 1.0
ppa2-6	11.7 ± 1.0	9.6 ± 0.9
ypa1−Δ	14.1 ± 1.4	12.6 ± 1.4
ypa2−Δ	9.6 ± 0.9	9.6 ± 0.7
ypa2-7	10.4 ± 1.0	10.1 ± 0.9

Cells were grown to exponential phase in YE medium at 32°; a fraction of the culture was shifted to 19° for 20 hr. Samples were taken before and after shift and cell length was determined as described in Materials and Methods. Length of septating cells is indicated, with standard deviation: n = 50 for each condition.