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8.
Proc Natl Acad Sci U S A ; 65(3): 585-92, 1970 Mar.
Article in English | MEDLINE | ID: mdl-5267140

ABSTRACT

(3)H-actinomycin D, a guanine-binding agent, labels fixed human chromosomes nonrandomly. Actinomycin D added in G2 inhibits secondary constrictions and breaks chromosomes. There is some tendency for label to be concentrated at the ends of chromosomes and near the centromere. Labeling with (3)H-thymidine in the late stage of DNA synthesis shows a different pattern and in general lacks the telomeric concentrations. The sites of actinomycin D-induced breaks do not show good correspondence with the sites of actinomycin D label.


Subject(s)
Chromosomes/drug effects , Dactinomycin/pharmacology , Chromosomes, Human, 1-3/drug effects , Chromosomes, Human, 13-15/drug effects , Chromosomes, Human, 16-18/drug effects , Chromosomes, Human, 19-20/drug effects , Chromosomes, Human, 21-22 and Y/drug effects , Chromosomes, Human, 4-5/drug effects , Chromosomes, Human, 6-12 and X/drug effects , DNA Replication , Fibroblasts , Humans , Lymphocytes , Sex Chromosomes/drug effects , Thymidine , Tritium
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