UV-induced galactose-negative mutants of Ophiostoma multiannulatum
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چکیده
منابع مشابه
The behavior of UV-induced coagulase-positive and negative mutants of Staphylococcus aureus.
The role of coagulase in staplhylococcal infections is tincertain. It has been clemonstrated(1) that coagulase-negative hemolytic staphylococci wllen treated witlh coagulase and injected intracerebrally into mice exlhibit a higlher degree of virulence than the same organisms without treatment with coagulase. Other workers(2,3) have also found an association of coagtulase with virulence. However...
متن کاملComplementation, Recombination, and Suppression in Galactose Negative Mutants of E. Coli.
The metabolism of galactose in Escherichia coli proceeds via conversion of galactose to glucose-i-phosphate by reactions catalyzed by the enzymes galactokinase, galactose-l-phosphate uridyl transferase, and UDPgalactose-4-epimerase.1 In addition to these reactions specific to galactose metabolism, the ability of the bacteria to utilize galactose depends on the production of catalytic amounts of...
متن کاملBase Analogue Induced Arabinose-negative Mutants of Escherichia Coli.
EOXYRIBONUCLEIC acid codes information as a specific linear sequence of the base pairs adenine-thymine (AT) and guanine-cytosine (GC) ( WATSON and CRICK 1953). Replacement of an AT pair by a GC pair, o r a GC pair by an AT pais may cause a visible mutation. A transition is a base-pair change as written above in which a purine replaces a purine, and a pyrimidine replaces a pyrimidine (FREESE 196...
متن کاملResistance of Salmonella typhimurium mutants to galactose death.
A class of galactose-resistant mutants has been derived from strains of Salmonella typhimurium which are defective in uridine diphosphoglucose-4-epimerase. Resistant strains are phenotypically similar to parent organisms but do not lyse in the presence of galactose. Low levels of functional epimerase can be detected in induced cells grown at 20 C but not at 37 C, and acid is not produced from g...
متن کاملProperties of mutants in galactose taxis and transport.
beta-Methylgalactoside (mgl) permease mutants of Escherichia coli, which are defective in three genes, mglA, mglB, and mglC, were assayed for galactose taxis and galactose transport. The mglB product is the galactose-binding protein. Previous evidence, supported by our new findings, shows that the galactose-binding protein is the recognition component for galactose taxis as well as for galactos...
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ژورنال
عنوان ژورنال: Hereditas
سال: 2009
ISSN: 0018-0661
DOI: 10.1111/j.1601-5223.1970.tb02298.x