Table 1. Summary of DNA sequences with methylation changes identified by AIMS in MZ twin pairs.

					CpG methylation,* %
Locus	Accession	Function	Chr. loc.	No. CpGs	Twin A	Twin B	Change
Alu-Sx	AC006271	–	19p13.2	30	72.1	55.3	16.8
Alu-Sp	U14572	–	19p13+3	17	68.1	29.9	38.2
Alu-E2F3	AF547386	–	6p22	2	81.8	100	18.2
PKD1P2	NG_002795	Polycystic kidney disease 1	16p13	7	90.9	83.5	7.4
Alu-Sc	U14571	–	8p11+1	4	66.6	63.3	3.3
GUK1	BC006249	Guanylate kinase 1	1q42	18	2.8	9.7	6.9

Chr. loc., chromosome location; –, unknown.

^*Twelve clones per locus