. 2002 Mar 12;99(6):3740–3745. doi: 10.1073/pnas.052410099

Table 2.

Effect of modifying criteria on CpG island distribution

Length	200	200	200	200	500^*	500^*	500^*	500^*
%GC	50	55^*	50	55^*	50	55^*	50	55^*
ObsCpG/ExpCpG	0.6	0.6	0.65^*	0.65^*	0.6	0.6	0.65^*	0.65^*
5′ region	195	188	173	172	166	164	163	161
Exon	757	620	529	460	143	133	126	120
Alu repeats	7,651	871	1,026	138	506	168	310	122
Unknown	5,459	7,804	7,955	6,511	669	711	767	698
Total	14,062	9,483	9,683	7,281	1,484	1,176	1,366	1,101

The effect of modifying the criteria on CpG island distribution is shown. Each modified parameter is indicated by an asterisk. Categorization was as described in Table 1. The existing criteria and modified criteria columns of the table are boldfaced.