Table 2. Frequency of high cyclicity values for different synchronization methods.

Genes selected from each synchronization experiment	300	200	100	50
Total analyzed after elimination of duplicates	883	595	322	175
Expected with no duplicates	1200	800	400	200
Number of times a given gene is found	Frequency of finding a gene either 1, 2, 3 or 4 times among the top cyclical genes in an experiment
4	9	3	0	0
3	59	40	12	2
2	172	116	54	21
1	643	436	256	152
Percentage singles	73%	73%	80%	87%