We describe the identification and characterization of a novel PcG gene in C. elegans, sor-1, which is involved in global repression of Hox genes. sor-1 encodes a novel protein with an RNA-binding activity. We provide evidence that SOR-1 and the previously identified RNA-binding protein SOP-2 may constitute an RNA-binding complex in Hox gene repression. SOR-1 and SOP-2 directly interact with ea...

In this paper we describe a novel generalized SOR algorithm for accelerating the convergence of the dynamic iteration method known as waveform relaxation. A new convolution SOR algorithm is presented, along with a theorem for determining the optimal convolution SOR parameter. Both analytic and experimental results are given to demonstrate that the convergence of the convolution SOR algorithm is...

A combined structural, functional, and genetic approach was used to investigate inhibition of bacterial RNA polymerase (RNAP) by sorangicin (Sor), a macrolide polyether antibiotic. Sor lacks chemical and structural similarity to the ansamycin rifampicin (Rif), an RNAP inhibitor widely used to treat tuberculosis. Nevertheless, structural analysis revealed Sor binds in the same RNAP beta subunit ...

surgery within 24 hours of hip fracture is a critical step in reducing complications, and may decrease mortality compared with conservative care (strength of recommendation [sor]: B, cohort studies). Give patients heparin at the time of admission to prevent venous thromboembolism (vTe) (sor: a, systematic reviews of rCTs). Anticoagulation should be continued in some form for 10 days or until th...

erythromycin has a limited role in treating pediatric patients (strength of recommendation [sOr]: B, limited-quality, patient-oriented evidence). Tegaserod and cisapride are the only prokinetic agents available for constipated adults (sOr: A, consistent, good-quality, patient-oriented evidence for tegaserod; sOr: B, for cisapride), but cardiovascular risk restricts prescribing of both medicatio...

no one treatment is best (strength of recommendation [SOR]: C, meta-analysis of heterogenous studies); no good evidence exists comparing treatments with each other. Triamcinolone injections, triamcinolone injections combined with excision, and cryotherapy all improve hypertrophic and keloid scars (SOR: C, case series studies). Silicone gel products have weak evidence of efficacy (SOR: C, Cochra...

Genes for superoxide reductase (Sor), rubredoxin (Rub), and rubredoxin:oxygen oxidoreductase (Roo) are located in close proximity in the chromosome of Desulfovibrio vulgaris Hildenborough. Protein blots confirmed the absence of Roo from roo mutant and sor-rub-roo (srr) mutant cells and its presence in sor mutant and wild-type cells grown under anaerobic conditions. Oxygen reduction rates of the...

Some sulfate-reducing and microaerophilic bacteria rely on the enzyme superoxide reductase (SOR) to eliminate the toxic superoxide anion radical (O2*-). SOR catalyses the one-electron reduction of O2*- to hydrogen peroxide at a nonheme ferrous iron center. The structures of Desulfoarculus baarsii SOR (mutant E47A) alone and in complex with ferrocyanide were solved to 1.15 and 1.7 A resolution, ...