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Reading comprehension activities are an authentic task including a rich, language-based context, which makes them an interesting reallife challenge for research into automatic content analysis. For textual entailment research, content assessment of reading comprehension exercises provides an interesting opportunity for extrinsic, real-purpose evaluation,(More)
The substrate specificity of the beta-glucosidase (CelB) from the hyperthermophilic archaeon Pyrococcus furiosus, a family 1 glycosyl hydrolase, has been studied at a molecular level. Following crystallization and X-ray diffraction of this enzyme, a 3.3 A resolution structural model has been obtained by molecular replacement. CelB shows a homo-tetramer(More)
Ribulose-5-phosphate 3-epimerase (EC catalyzes the interconversion of ribulose-5-phosphate and xylulose-5-phosphate in the Calvin cycle and in the oxidative pentose phosphate pathway. The enzyme from potato chloroplasts was expressed in Escherichia coli, isolated and crystallized. The crystal structure was elucidated by multiple isomorphous(More)
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