Distribution of 5-methylcytosine in the DNA of somatic and germline cells from bovine tissues.

Abstract:

:Genomic DNA of calf thymus contains 1.5 times as much 5-methylcytosine as similar sperm DNA, but the major EcoRI repeat fragment from satellite I of thymus contains ten times as much 5-methylcytosine as the corresponding fragment from sperm DNA. Restriction enzyme analyses of the total DNA and the satellite I fragment show that three HpaII sites in the fragment are completely unmethylated in sperm but fully methylated in thymus DNA. Under-methylation of many sites in the satellite DNAs can probably account for the lower level of methylation of sperm DNA rather than hemimethylation as previously suggested. These results are also discussed in relation to maintenance and de novo (initiation-type) methylases.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Sturm KS,Taylor JH

doi

10.1093/nar/9.18.4537

subject

Has Abstract

pub_date

1981-09-25 00:00:00

pages

4537-46

issue

18

eissn

0305-1048

issn

1362-4962

journal_volume

9

pub_type

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