Further Studies on Mutant Strains of Ophiostoma Which Require Guanine
نویسندگان
چکیده
منابع مشابه
Further 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 کاملFurther studies of mutant strains of Neurospora requiring isoleucine and valine.
Investigations of biochemical mutations in Neurospora support the thesis that there exists a 1:1 relation between chemical reaction and gene (2, 5, 10). A single gene mutation therefore might be expected to block a single reaction, possibly by conditioning the formation of a single enzyme. While a single enzyme may catalyze a number of reactions of a common type, general experience with mutants...
متن کاملPhotosynthetic Studies With Mutant Strains of Chlorella.
Fractionation of Amino Acids From Hydrolysates in Nonaqueous Systems: E. V. McCollum and Agatha A. Rider ............... 111 The Control of Grass Weeds in Sugar-Cane Fields in Puerto Rico: J. A. B Nolla ............. .......................... 112 Demonstration of Reducing Enzyme Systems in Neoplasms and Living Mammalian Tissues by Triphenyltetrazolium Chloride: Francis H. Straus, Nicholas D. C...
متن کاملThe diversity of mtDNA rns introns among strains of Ophiostoma piliferum, Ophiostoma pluriannulatum and related species
BACKGROUND Based on previous studies, it was suspected that the mitochondrial rns gene within the Ophiostomatales is rich in introns. This study focused on a collection of strains representing Ophiostoma piliferum, Ophiostoma pluriannulatum and related species that cause blue-stain; these fungi colonize the sapwood of trees and impart a dark stain. This reduces the value of the lumber. The goal...
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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1953
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)38468-0