منابع مشابه
Biosynthesis of ketomycin.
The antibiotic ketomycin is formed from shikimic acid via chorismic acid and prephenic acid. Phenylalanine and 2',5'-dihydrophenylalanine are not intermediates in the biosynthesis. Degradation of ketomycin derived from [1,6-14C]shikimic acid showed that prephenic acid is converted into ketomycin with stereospecific discrimination between the two enantiotopic edges of the ring, the pro-S-R edge ...
متن کاملDefective transamination, a mechanism for resistance to ketomycin in Escherichia coli.
A spontaneous mutant of a derivative of Escherichia coli strain K-12 resistant to 50 mug of ketomycin per ml was selected. The mutant displayed a two- to threefold derepression of the isoleucine-valine biosynthetic enzymes and a reduced growth rate in minimal medium. The lesion was found to lie in the gene (ilvE) specifying transaminase B and resulted in an isoleucine limitation. The presence o...
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Objective(s): In recent years, the biosynthesis of gold nanoparticles has been the focus of interest because of their emerging application in a number of areas such as biomedicine. In the present study we report the extracellular biosynthesis of gold nanoparticles (AuNPs) by using a positive bacterium named Streptomyces fulvissimus isolate U from rice fields of Guilan Province, Iran.Materials a...
متن کاملBiosynthesis of Silver nanoparticles from Actinomycetes for therapeutic applications
Silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. Silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. A simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles. The present study aimed at the comparative study of silver nanopartic...
متن کاملBiosynthesis of Silver nanoparticles from Actinomycetes for therapeutic applications
Silver is composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. Silver nanoparticles have been a potent antibacterial, antifungal, anti-viral and anti-inflammatory agent. A simple, eco-friendly, inexpensive biosynthetic method was employed to synthesize silver nanoparticles. The present study aimed at the comparative study of silver nanopartic...
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ژورنال
عنوان ژورنال: The Journal of Antibiotics
سال: 1984
ISSN: 0021-8820,1881-1469
DOI: 10.7164/antibiotics.37.868