Table 1

Time dependence of serum-induced cell-cycle progression in synchronized A10 vascular smooth muscle cells

Time Since Serum Repletion	G₀/G₁	S	G₂/M
	%	%	%
10% FCS 0 h	86.7 ± 0.8^1-160	12.1 ± 1.4^1-160	1.1 ± 0.8
17 h	57.0 ± 0.7	43.0 ± 0.7	2.3 ± 0.8
18 h	41.0 ± 0.31	55.0 ± 3.2	4.0 ± 1.5
19 h	48.2 ± 1.3	38.2 ± 2.8	13.5 ± 4.2
20 h	45.8 ± 2.6	29.4 ± 2.6	24.8 ± 0.1
10% FCS (18 h) + 10⁻⁸ Ml-citrulline	45.1 ± 5.2	40.0 ± 1.2^1-150	7.7 ± 2.5

Times given are those transpiring between serum repletion and cell harvesting. Cell distribution was evaluated by flow cytometric determination of DNA content.

↵1-150 P < .05 compared with 10% FCS-treated cells during 18 h.
↵1-160 P < .01.