STABILITY OF DROSOPHILA CHROMOSOMES TO RADIOACTIVE DECAY OF INCORPORATED PHOSPHORUS-32
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چکیده
منابع مشابه
Stability of Drosophila chromosomes to radioactive decay of incorporated phosphorus-32.
HOSPHORUS-32 incorporated into DNA in Drosophila melanogaster germ cells offers a method of analyzing the genetic effects-if any--of a known number of transmutations and associated energies of recoil in the DNA, provided the genetic effect of the “long range” and therefore nonspecific beta radiation can be eliminated or accurately determined. In multicellular organisms the separation of the mut...
متن کاملInactivation of Bacteriophages by Decay of Incorporated Radioactive Phosphorus
The inactivation of the phages T1, T2, T3, T5, T7, and lambda by decay of incorporated P(32) has been studied. It was found that these phages fall into two classes of sensitivity to P(32) decay: at the same specific activity of P(32) in their deoxyribonucleic acid (DNA), T2 and T5 are inactivated three times as rapidly as T1, T3, T7, and lambda. Since the strains of the first class were found t...
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Cultures of Escherichia coli will not grow in media containing very high specific activities of radiophosphorus P(32), the inhibition of growth being due to the decay of assimilated P(32) atoms. Experiments with a differentially labeled thymineless strain of E. coli show that the P(32) disintegrations which occur in the bacterial deoxyribonucleic acid, i.e. in the nucleus, are mainly responsibl...
متن کاملDecay of Incorporated Radioactive Phosphorus during Reproduction of Bacteriophage T2
The multiplication of vegetative T2 bacteriophage in B/r bacteria has been followed by studying the lethal effects of decay of incorporated radiophosphorus P(32) at various stages of the eclipse period. Experiment I. Non-radioactive B/r bacteria were infected with highly radioactive (i.e. P(32)-unstable) T2 and infection allowed to proceed at 37 degrees C. for various numbers of minutes before ...
متن کاملInactivation of Bacteriophages by Decay of Incorporated Radioactive Phosphorus* by Gunther
I t was observed by Hershey, Kamen, Kennedy, and Gest (1951) that bacteriophages are unstable if they contain radiophosphorus p82 of high specific activity. From day to day, progressively decreasing fractions of such populations of radioactive phage are still able to form plaques when plated on a sensitive bacterial strain, and the rate of loss of infective titer depends on the specific activit...
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ژورنال
عنوان ژورنال: Genetics
سال: 1966
ISSN: 1943-2631
DOI: 10.1093/genetics/53.5.807