Nature, Volume 253Sir Norman Lockyer Macmillan Journals Limited, 1975 |
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Página 194
... shown in Fig . 2 ; addition of the drug before replication completely blocked the appearance of meiotic recombinants , however , the low frequency of leucine prototrophs pre - existing in the population was not affected . When HU was ...
... shown in Fig . 2 ; addition of the drug before replication completely blocked the appearance of meiotic recombinants , however , the low frequency of leucine prototrophs pre - existing in the population was not affected . When HU was ...
Página 325
... shown in Figs 2-4 . In addition to this , the adenine residues are hydrogen bonded to the ribose hydroxyl groups of an adjoining uridine where the interactions are between the N6 amino group of adenine and O3 ′ of the ribose ( 2.95 Å ) ...
... shown in Figs 2-4 . In addition to this , the adenine residues are hydrogen bonded to the ribose hydroxyl groups of an adjoining uridine where the interactions are between the N6 amino group of adenine and O3 ′ of the ribose ( 2.95 Å ) ...
Página 452
... shown ) . Both variables were also lost by replacing [ Sr2 + ] with [ Co2 + ]。( Fig . 3a ) ; again , BPP activity was not restored by extrinsic current . Others have shown correlations between the NSR and BPP activity when they were ...
... shown ) . Both variables were also lost by replacing [ Sr2 + ] with [ Co2 + ]。( Fig . 3a ) ; again , BPP activity was not restored by extrinsic current . Others have shown correlations between the NSR and BPP activity when they were ...
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London Ltd 1974 2 50 | 2 |
72 Ft Harcourt Brace Jovanovich Publishers 1974 18 50 | 18 |
PrenticeHall Inc 1974 Cleveland Ohio CRC Press Inc Oxford Blackwell Scientific Publications 1974 | 119 |
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