This is a preview. Log in through your library . Abstract Cultured fibroblasts or epithelial cells derived from Xenopus laevis embryos were directly frozen, freeze-substituted by an improved method, ...

Figure 1: The G-quadruplex structure-specific antibody, BG4, binds with high affinity to RNA G-quadruplex structures. Here we show that a G-quadruplex-specific antibody, BG4 (ref. 4), binds to RNA ...

The nuclear pore complex (NPC) mediates transport of all macromolecules between the nucleus and the cytoplasm. The structure of the NPC — a cylindrical ring-like structure lined with nucleoporins ...

We have used size-fractionated, fluorescent dextrans to probe the structure of the cytoplasmic ground substance of living Swiss 3T3 cells by fluorescence recovery after photobleaching and video image ...