方案摘要
方案下载应用领域 | 生物产业 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
采用立陶宛Ekspla公司的5ns脉宽可调谐激光器的630nm,0.5mJ输出光解蓝藻植物色素分子,并采用时间分辨X射线散射法探测光诱导结构改变。
Phytochromes are photoreceptor proteins that transmit a light signal from a photosensory
region to an output domain. Photoconversion involves protein conformational changes whose
nature is not fully understood. Here, we use time-resolved X-ray scattering and optical
spectroscopy to study the kinetics of structural changes in a full-length cyanobacterial
phytochrome and in a truncated form with no output domain. X-ray and spectroscopic signals
on the μs/ms timescale are largely independent of the presence of the output domain. On
longer time-scales, large differences between the full-length and truncated proteins indicate
the timeframe during which the structural transition is transmitted from the photosensory
region to the output domain and represent a large quaternary motion. The suggested independence of the photosensory-region dynamics on the μs/ms timescale defines a time
window in which the photoreaction can be characterized (e.g. for optogenetic design)
independently of the nature of the engineered output domain.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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