he movements of cilia and flagella are driven by axonemal dynein ATPases, whose activity must be coordinated in space and time. On page 47, Rupp and Porter provide the first molecular characterization of a component of the dynein regulatory complex (DRC), a crucial but poorly understood regulator of flagellar movement. Besides suggesting a model for DRC assembly, the work identifies a possible ...

Works intended for this column should be sent direct to the Book-Review Editor, whose address appears in this issue. All reviews are also available from Crystallography Journals Online, supplemented where possible with direct links to the publisher's information. The following books have been received by the Editor. Uncritical notices are given under this heading instead of reviews in order to ...

The paper examines the methodological principles of the psychological study of ecological consciousness as one of the urgent interdisciplinary problems of XX–XXI century, caused by the aggravation of global ecological problems and the need for the realization of the “sustainable development”ideas. Ecological consciousness is considered as multilayered, dynamic, reflexive element of human consci...

Using magnetic tweezers, we study in real time the condensation of single DNA molecules under tension. We find that DNA condensation occurs via discrete nucleated events. By measuring the influence of an imposed twist, we show that condensation is initiated by the formation of a plectonemic supercoil. This demonstrates a strong interplay between the condensation transition and externally impose...

Certain chromosome rearrangements display a significant delay in replication timing that is associated with a delay in mitotic chromosome condensation. Chromosomes with delay in replication timing/delay in mitotic chromosome condensation participate in frequent secondary rearrangements, indicating that cells with delay in replication timing/delay in mitotic chromosome condensation display chrom...