منابع مشابه
Nitrate transport in plants: which gene and which control?
Nitrate uptake by root cells is a key step of nitrogen metabolism and has been widely studied at the physiological level and, more recently, at the molecular level. Two classes of genes, NRT1 and NRT2, have been found to be potentially involved in the high and low affinity nitrate transport systems (HATS and LATS, respectively). The complexity of the molecular basis of nitrate uptake has been e...
متن کاملWhich post-marketing database and studies does EMEA require.
The European process for assessment of pharmaceutical products is complex and presents with diVerent levels. There is the European level with two major procedures resulting in decisions on approval after applications to market a pharmaceutical product in European countries. One is the centralised procedure organised by the European Medicines Evaluation Agency (EMEA). The other one is the mutual...
متن کاملFurther studies on mutant strains of Ophiostoma which require guanine.
Biochemical mutants which require guanine but are unable to utilize adenine and hypoxanthine obviously represent a very rare type of purine deficiency in microorganisms. So far, guanineless mutations have been observed only in the ascomycet,ous fungus, Ophiostoma multiannulatum, in which seven strains of this biochemical type were isolated after x-ray or ultraviolet irradiation (l-3). Three of ...
متن کاملDetermining Mobile Robot Actions which Require Sensor Interaction
In order for a mobile robot to accomplish a non-trivial task, the task must be described in terms of primitive actions of the robot’s actuators. Our contention is that the transformation from the high level description of the task to the primitive actions should be performed primarily at execution time, when knowledge about the environment can be obtained through sensors. We propose to produce ...
متن کاملAccurate sodium bisulfite sequencing in plants.
DNA cytosine methylation is a conserved epigenetic modification frequently correlating with transcriptional silencing in a wide variety of eukaryotic organisms. Sodium bisulfite treatment of DNA converts unmethylated cytosine to uracil, while 5-methylated cytosine is protected. We describe techniques that ensure reliable sequencing data following sodium bisulfite conversion and to avoid common ...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1912
ISSN: 0006-8071
DOI: 10.1086/330956