“Empty” cyclodextrins contain water in their annular cavities; the hydrate form of β‐cyclodextrin (cycloheptaamylose, β‐CD) has now been subjected to an X‐ray study. β‐CD·12H2O assumes an almost “round” shape. No far‐reaching changes of conformation take place on complex formation with guest molecules.
Previous research on sentence comprehension conducted with German-learning children has concentrated on the role of case marking and word order in typically developing children. This paper compares the performance of German-learning children with language impairment (age 4-6 years) and without language impairment (aged 2-6, 8-9 years)
The three‐dimensional structure of the fungal serine protease proteinase K has been determined at 3.3 A resolution by single crystal X‐ray diffraction analysis. The enzyme crystallizes in the tetragonal space group P4(3)2(1)2 with cell constants a = b = 68.3 A, c = 108.5 A. The asymmetric unit consists of one monomer of 27 000 daltons mol. wt., approximately 50% higher than the so far assumed value of 18 500 daltons. The main chain fold of proteinase K shows a high degree of tertiary homology with the corresponding bacterial subtilisin BPN’. Proteinase K is the second enzyme in this family of serine proteases to be studied by X‐ray diffraction, thus confirming the existence of two unrelated families of serine proteases in pro‐and eukaryotes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.