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Temporal studies of factors associated with changes in transcription during Q fever.

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Temporal studies were made of factors associated with increased RNA synthesis in guinea pig liver during Q fever. DNA-dependent RNA polymerase activities increased immediately after infection. The major distribution of RNA polymerase classes shifted from class II to class I during infection.

Effects of treatments with alpha-difluoromethylornithine and hyperthermia on the growth and polyamine metabolism of Harding-Passey murine melanoma.

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The oral administration of alpha-difluoromethylornithine (DFMO), an enzyme-activated inhibitor of ornithine decarboxylase (ODC), produced a marked decrease in the rate of growth of amelanotic Harding-Passey melanoma transplanted in mice. The half-life of this compound in Harding-Pasey melanoma was

Polyamines, and effects from reducing their synthesis during egg development in the yellow fever mosquito, Aedes aegypti.

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Development of eggs after a blood meal in the yellow fever mosquito Aedes aegypti involves hormonal changes, synthesis of nucleic acids, activation of the digestive enzyme trypsin, and production of the yolk protein vitellogenin. Polyamines have been implicated in growth processes and were here

The mysterious polyamines, the enigmatic Barr body, and lupus: comment on the article by Kim et al.

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"Polyamine patterns in plasma of patients with systemic lupus erythematosus and fever" by Kim et al. provides insight into possible involvement of polyamines in systemic lupus erythematosus (SLE). The authors report decreases in N1-acetylspermidine, spermidine, spermine, and N1-acetylcadaverine and

Serotonin syndrome.

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We describe a patient treated with trazodone, isocarboxazid, and methylphenidate hydrochloride who developed confusion, agitation, poor concentration, rigidity, myoclonus, involuntary movements, orthostatic hypotension, and hyperreflexia. CK was normal, and the syndrome resolved spontaneously over

Construction of plasmid, bacterial expression, purification, and assay of dengue virus type 2 NS5 methyltransferase.

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Dengue virus (DENV), a member of mosquito-borne flavivirus, causes self-limiting dengue fever as well as life-threatening dengue hemorrhagic fever and dengue shock syndrome. Its positive sense RNA genome has a cap at the 5'-end and no poly(A) tail at the 3'-end. The viral RNA encodes a single

L-deaza-5'-noraisteromycin.

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(+/-)-1-Deazaaristeromycin (4) has been reported to be an inactivator of S-adenosylhomocysteine (AdoHcy) hydrolase and, as a consequence, to affect S-adenosylmethionine (AdoMet) mediated macromolecular biomethylations. To extend this to our program focused on 5'-noraristeromycin derivatives as

Synthesis of 3-deazaneplanocin A, a powerful inhibitor of S-adenosylhomocysteine hydrolase with potent and selective in vitro and in vivo antiviral activities.

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The neplanocin A analogue 3-deazaneplanocin A (2b) has been synthesized. A direct SN2 displacement on the cyclopentenyl mesylate 3 by the sodium salt of 6-chloro-3-deazapurine afforded the desired regioisomer 4 as the major product. After deprotection, this material was converted to

Histone Methyltransferase DOT1L is Involved in Larval Molting and Second Stage Nymphal Feeding in Ornithodoros Moubata.

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Epigenetic mechanisms have not been characterized in ticks despite their importance as vectors of human and animal diseases worldwide. Our investigation identifies and functionally characterizes the orthologue of S-adenosylmethionine (SAM) binding methyltransferase enzyme, disruptor of telomeric

Structural Insights into Substrate Recognition and Catalysis in Outer Membrane Protein B (OmpB) by Protein-lysine Methyltransferases from Rickettsia.

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Rickettsia belong to a family of Gram-negative obligate intracellular infectious bacteria that are the causative agents of typhus and spotted fever. Outer membrane protein B (OmpB) occurs in all rickettsial species, serves as a protective envelope, mediates host cell adhesion and invasion, and is a

Rickettsial metK-encoded methionine adenosyltransferase expression in an Escherichia coli metK deletion strain.

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The obligate intracellular bacterium Rickettsia prowazekii has recently been shown to transport the essential metabolite S-adenosylmethionine (SAM). The existence of such a transporter would suggest that the metK gene, coding for the enzyme that synthesizes SAM, is unnecessary for rickettsial

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