we have used highly methylation tolerant host strains to clone hyper- and hypo-methylated genomic elements from different regions of the same family of long interspersed repetitive elements from human dna , specifically the 1.8 kilobase ( kb ) and 1.2kb kpni fragments from members of the l1 family of transposable elements in which respectively some 18 % and 2.7 % of cytosines are methylated in vivo in human spleen dna .
C0012868
transposable elements
C0012854
dna