Abstract
Short pulses (30 sec at 32 C) of (3)H-thymidine were found primarily in the viral strands of replicating fd deoxyribonucleic acid (DNA), even at a time when most DNA being synthesized was duplex DNA. Much of the labeled viral strand DNA was longer than unit length, but some was shorter than unit length. Most of the corresponding complementary-strand DNA was recovered in closed supercoiled duplex molecules, even for short pulses; the remainder of the complementary-strand DNA was found in replicative intermediates in pieces shorter than unit length. Some of the viral strands in open replicating DNA lacked a corresponding complementary strand.
MeSH Terms
Centrifugation, Density Gradient
Coliphages/growth & development,metabolism
DNA Replication
DNA, Bacterial/analysis,biosynthesis,isolation & purification
DNA, Viral/analysis,biosynthesis,isolation & purification
Escherichia coli/analysis,drug effects,metabolism
Mitomycins/pharmacology
Phosphoric Acids/metabolism
Phosphorus Isotopes
Thymidine/metabolism
Thymine/metabolism
Tritium
Chemicals
DNA, Bacterial
DNA, Viral
Mitomycins
Phosphoric Acids
Phosphorus Isotopes
Tritium
Thymine
Thymidine
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Tseng B Y
Marvin D A
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