作者: M S Turker , K Swisshelm , A C Smith , G M Martin
DOI: 10.1016/S0021-9258(18)80110-7
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摘要: We wished to determine if a partial methylation profile for specific CpG site was stably maintained in both mammalian tissues and cultured cell lines. To accomplish this, we identified with located upstream of the mouse adenine phosphoribosyltransferase promoter region. This found be methylated at level approximately 25% brain, kidney, lung, skeletal muscle tissues, close 50% liver, 0% testis. These tissue-specific profiles were not altered during aging. A this also observed five teratocarcinoma stem lines one additional line. profile, however, upon cellular differentiation, hemizygosity, loss activity some conclude that can vivo vitro mechanism exists its maintenance. The functional significance remains determined.