The tobacco mitogen-activated protein kinase (MAPK) cascade, which includes MAPK NRK1/NTF6, positively regulates expansion of the cytokinetic machinery known as the phragmoplast, which is followed by the synthesis of cell plates for completion of cell division. However, molecular events lying between the MAPK and phragmoplast expansion were not known. Here, we show that NRK1/NTF6 phosphorylates...

The ground-state and low-energy properties of the two-dimensional J1−J2 Heisenberg model in the collinear phase are investigated using finite-size spin-wave theory [Q. F. Zhong and S. Sorella, Europhys. Lett. 21, 629 (1993)], and Lanczos exact diagonalizations. For spin one-half – where the effects of quantization are the strongest – the spinwave expansion turns out to be quantitatively accurat...

Studies from several laboratories have evaluated the role of cell surface antigenic molecules on target cells in natural killer (NK)-mediated cytotoxicity. A number of these cell surface molecules are associated with cell proliferation and may be expressed preferentially during one phase of the cell cycle. The purpose of this investigation was to evaluate the role that target cell cycle plays i...

We have found that hypergravity stimulates the proliferation of HeLa cells through reduction of the G1 phase duration, concomitant with enhancement of c-myc gene expression. HeLa cells were grown in monolayer in culture flasks that were centrifuged to generate a constant 18, 35 or 70 g at 37 degrees C for up to 4 days. The cell proliferation was enhanced at 18, 35 and 70 g, most notably at 35 g...

The explicit CP violation in the MSSM radiatively induces a finite unremovable alignment between the Higgs doublets. This additinal phase can be as large as the original CP phases in certain portions of the MSSM parameter space. Considering the specific case of the charginos, this additional phase is shown to induce a conceivable amount of CP violation near the would–be CP conserving points. Mo...

2005 According to the phase theory, the recent development of the Minimalist Program, sentences are built in smaller chunks––phases. Each phase starts out with its own numeration and is completed when the structure constructed in a phase is sent to the two interfaces, PF and LF. Thus, because of simultaneous Spell-Out, every element participating in the derivation should be both pronounced and ...