Table 1. Cell cycle (stage) duration measurements.

Cell cycle (stage)	HeLa Kyoto (h)				C2C12 (h)
	Mean	s.d.	s.e.m.	n	Mean	s.d.	s.e.m.	n
G1	8.9	1.8	0.3	31	8.8	3.4	0.7	20
S-phase	9.5	0.8	0.2	30	9.4	1.5	0.4	16
G2	3.7	0.7	0.1	27	3.7	0.8	0.3	5
Mitosis	0.9	0.2	0.0	26	0.8	0.2	0.1	10
Doubling time	22.6	2.3	0.4		22.6	2.5	1.0

n, Number of cells.