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全部话题 - 话题: 18kd
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c*********d
发帖数: 9770
1
根据俄罗斯阿尔玛兹设计局2018年1月最新发布的消息,其最新的“铠甲”-ME型近
防系统研发工作已经接近尾声,将于在今年装舰进行测试。该系统是“铠甲”-S1型近
防系统的海基版本,在性能上获得了很大的提升。
一般认为,最新的“铠甲”-ME是“铠甲”-S1型近防系统和“卡什坦”近防系统的
混血,兼具两者的长处。该系统配备了“铠甲”系统的1RS2-1E型相控阵雷达,同时也
安装有光电/红外目标获取和识别系统。
“铠甲”-ME型近防系统在俄罗斯海军的大小舰艇上都可配备,比如“库兹涅佐夫
”号航母、“基洛夫”级巡洋舰和“卡尔库特”级轻型护卫舰都能装上。该系统配有两
门GSh-6-30K/AO-18KD型30毫米加特林炮,具备非常强大的瞬时火力。
单门GSh-6-30K/AO-18KD型30毫米加特林炮的射速为4000~6000发/分,而两门炮加
起来射速可以达到1.2万发/分。相比之下,早期的“铠甲”-S1系统仅仅装两门单管的
30毫米机关炮,单炮射速仅有2500发/分。因此,仅仅火炮的射速就提升了很多。
该系统的反应时间为3~5秒,可同时拦截4个目标。武器方面,GSh-6-30K/AO-18... 阅读全帖
z***g
发帖数: 28
2
来自主题: Biology版 - about membrane protein purification
Hey guys
I am doing purification of membrane proteins to get enough concentration for
NMR study, the protein was labeled by his-tag
Firstly, the protein was expressed by E. coli, lysed by several enzymes,
agents and detergent(empigen) to solublize everything, then it was purified
by Ni-NTA column, the protein shows at the right MW(about 18KD) at commassie
blue stained gel.
However, the problem is, after the second purification---ion exchange on
Capto Q(pH 8.0), the protein which we collected doe... 阅读全帖
s******y
发帖数: 28562
3
只有一条带么?如果能看到两条带的话,很可能是mono-ubiquitinylation(18kd)
or SUMO
当然,也不能排除磷酸化
t******y
发帖数: 716
4
mono-ubiquitinylation 应该到不了18kd,ubiquitin的分子量7.6kd。
z***g
发帖数: 28
5
来自主题: Biology版 - about membrane protein purification
Thank you pal, actually the flowthrough is the third left to the marker,
sorry for not mentioning...and the 23KD and 18KD are also in the flowthrough
( but so weak compared to the peak I collected), it's possible that the
protein was trapped, but the amount of proteins seems the same to me,
although we didn't quantify... haha, thank you very much for answering
f*******d
发帖数: 92
6
来自主题: Biology版 - histone Wester blot
Histone 是很容易做的,要sonicate cell lysates, 确保细胞核裂解,RIPA buffer绝
对没问题。如果没有的话,1% SDS + heating也很容易看到,如果还看不到的话,用
8M UREA+RIPA, 这样的话,即使在胶上都能看到很强的band. 此外这个protein特别小
,好像15还是18kD, 所以胶别跑过了。
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