We consider the general class of theories in which there is a new ultralight scalar field that mediates an equivalence principle violating, long-range force. In such framework, Sun and Earth act as sources field, leading to potentially observable location-dependent effects on atomic nuclear spectra. determine sensitivity current next-generation clocks these compare results against existing labo...

Nucleocytoplasmic transport involves assembly and movement across the nuclear envelope of cargo-receptor complexes that interact with the small GTPase Ran. The asymmetric distribution of Ran regulator proteins, RanGAP1 and RCC1, provides the driving force and directionality for nuclear transport.

We review recent efforts to detect small numbers of nuclear spins using magnetic resonance force microscopy. Magnetic resonance force microscopy (MRFM) is a scanning probe technique that relies on the mechanical measurement of the weak magnetic force between a microscopic magnet and the magnetic moments in a sample. Spurred by the recent progress in fabricating ultrasensitive force detectors, M...

Toward dissecting the molecular composition and architecture of the nuclear pore complex (NPC), over the past 18 months novel nucleoporins and NPC subcomplexes were identified and characterized. The three-dimensional structure of isolated yeast NPCs was determined by electron cryomicroscopy. New specimen preparation and labeling protocols localized a number of nucleoporins and NPC subcomplexes ...