Unusual Reactivity of Purinophanes Due to Stereoelectronic Effect
نویسندگان
چکیده
منابع مشابه
A stereoelectronic effect in prebiotic nucleotide synthesis.
A plausible route for the spontaneous synthesis of an activated ribonucleotide that is poised for polymerization has been put forth (Powner et al. (2009) Nature, 459, 239-242). A key step in this route necessitates the regioselective phosphorylation of the secondary alcohol on C(3') of an anhydroarabinonucleoside in the presence of the primary alcohol on C(5'). Here, we propose that this regios...
متن کاملAn unusual case of hyalohyphomycosis due to Purpureocillium lilacinum in a patient with myasthenia gravis
Background and Purpose: Purpureocillium lilacinum (previously known as Paecilomyces lilacinus) and Paecilomyces variotii cause hyalohyphomycosis. Case report: In this study, we present a case of multiple subcutaneous abscesses of the lower limbs due to Purpureocillium lilacinum in a patient with myasthenia gravis and uncontrolled diabetes. Subcutaneous involvement of the lower limbs with thi...
متن کاملConformational stability of collagen relies on a stereoelectronic effect.
A polypeptide chain can adopt many conformations. Yet, the sequence of its amino acid residues directs folding to a particular native state.1 The loss of conformational entropy associated with folding destabilizes the native state. This destabilization is overcome by the hydrophobic effect, hydrogen bonds, other noncovalent interactions, and disulfide bonds.2 We have identified another force th...
متن کاملAortic regurgitation due to syphilis: unusual case.
A 28 year old man developed signs and symptoms of left ventricular failure and was found to have gross aortic regurgitation. He underwent an aortic valve replacement, and histology showed changes characteristic of syphilis. Both the age of this patient and the mode of presentation were atypical of cardiovascular syphilis.
متن کاملUnusual fixed drug eruption due to rifampicin.
A 24-year-old soldier suffering from borderline tuberculoid leprosy (BT) was admitted to the Leprosy Center, Base Hospital, Lucknow for supervised institutional therapy. He was put on cap RPM 600 mg once a month and dapsone 100 mg daily . The patient developed a solitary itchy erythematous urticarial lesion of 3 .5 cm diameter with typical peau d' orange appear ance (Figure 1 ) , on the right ...
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: Bulletin of the Chemical Society of Japan
سال: 1989
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.62.3155