The Archaea-a biochemical perspective

Biochemical characterization of pantoate kinase, a novel enzyme necessary for coenzyme A biosynthesis in the Archaea.

Although bacteria and eukaryotes share a pathway for coenzyme A (CoA) biosynthesis, we previously clarified that most archaea utilize a distinct pathway for the conversion of pantoate to 4'-phosphopantothenate. Whereas bacteria/eukaryotes use pantothenate synthetase and pantothenate kinase (PanK), the hyperthermophilic archaeon Thermococcus kodakarensis utilizes two novel enzymes: pantoate kina...

Boron Neutron Capture Therapy: A Biochemical Perspective

Pellagra and alcoholism: a biochemical perspective.

Historical and clinical aspects of pellagra and its relationship to alcoholism are reviewed from a biochemical perspective. Pellagra is caused by deficiency of niacin (nicotinic acid) and/or its tryptophan (Trp) precursor and is compounded by B vitamin deficiencies. Existence on maize or sorghum diets and loss of or failure to isolate niacin from them led to pellagra incidence in India, South A...

Viruses of the Archaea: a View on the Viral World from the Perspective of Hyperthermophilic Viruses

The views on the nature and evolution of viruses are changing in recent years as a result of the advances in environmental virology and the characterization of a plethora of novel viruses of microorganisms. One intriguing group of novel viruses infects hyperthermophilic members of the Archaea, a domain of life different from the Bacteria and Eukarya. Twenty-two archaeal DNA viruses isolated and...

a gender-based pragmatic analysis of the use of english compliment responses by iraqi efl students:a speech act perspective

تعارفات کنش های گفتاری هستند که افراد در زندگی روزمر? خود به منظور برقراری دوستی یا تداوم روابط مسالمت آمیز به کار می برند. ساز و کار تعارف مختص زبان انگلیسی یا هر زبان دیگری نیست و پدیده ای است جهانی و در همه زبانها حضور دارد. تفاوتی که از این نظر در زبانها و فرهنگ ها وجود دارد مربوط به پاسخ به این کنش گفتاری در گفتمان است. این مطالعه به بررسی تنوع پاسخ های انگلیسی و عربی به کنش گفتاری تعارف د...