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Previously, eye positions were characterized by the direction of sight, which has two degrees of freedom for conjugate movements and three degrees of freedom for vergent movements. Several groups have recently presented reliable data and unconventional models on binocular coordination, where all three degrees of freedom for one or both eyes have been taken into account. The results illustrate Bernstein's principle that in order to simplify control, the brain establishes unique relations between the target and motor space, in which non-Euclidean geometry of rotations is observed. 相似文献
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Oomycetes, effectors, and all that jazz 总被引:1,自引:0,他引:1
Plant pathogenic oomycetes secrete a diverse repertoire of effector proteins that modulate host innate immunity and enable parasitic infection. Understanding how effectors evolve, translocate and traffic inside host cells, and perturb host processes are major themes in the study of oomycete-plant interactions. The last year has seen important progress in the study of oomycete effectors with, notably, the elucidation of the 3D structures of five RXLR effectors, and novel insights into how cytoplasmic effectors subvert host cells. In this review, we discuss these and other recent advances and highlight the most important open questions in oomycete effector biology. 相似文献
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Umesh Varshney 《Journal of biosciences》2006,31(4):437-438
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T Richards 《BMJ (Clinical research ed.)》1991,303(6813):1319-1322
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《Cell cycle (Georgetown, Tex.)》2013,12(24):4060-4066
In neoplastic cells, proteins exert either pro or anti-tumorigenic functions. However, some proteins exhibit both properties, commonly dependent on specific aberrations occurring in a tumor-specific context. Recently, we demonstrated that the integrin-linked kinase (ILK), generally characterized as an oncogenic protein kinase, functions as a tumor suppressor protein in vitro and in vivo in the aggressive pediatric tumor, rhabdomyosarcoma (RMS). Other studies have similarly demonstrated both growth and tumor suppressive functions for ILK in normal and transformed tissues. The mechanism of ILK tumor suppression in RMS relies on expression levels of another kinase, the c-jun amino terminal kinase-1 (JNK1). These findings support a model in which ILK tumor suppression is mediated in part by elevated JNK1 expression, and indicate both a rationale for stratification of patients to receive anti-ILK therapies, and a need to better understand the context in which ILK displays its seemingly contradictory functions. This review discusses the complex roles of ILK in tumorigenesis, and offers arguments to harness ILK and JNK signaling as novel targets for anti-cancer therapy. 相似文献
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L S Lewis 《BMJ (Clinical research ed.)》1981,283(6287):383-384