m*e
2 楼
金星这个人既不幽默,也没涵养,长得又恶心,尤其说话的声音,眉飞色舞的,对别人指指点点,而且还抨击的都是些比较善良的明星,这是个什么鬼啊?为什么电视台要让这样的鬼上电视呢?太恶心了。而且网上好像还有很多金星的水军,这个人凭什么当主持人啊?就因为她敢乱喷吗?她根本不具备一个主持人的基本素质啊,普通话带着东北味儿,声音很脏,主要的是这个人的心理很变态,心胸狭窄,赶紧让她滚蛋吧。
O*n
3 楼
向小雨是何洁演的。
m*m
4 楼
用饱和硫酸铵沉淀了蛋白,完全去除上清液后,PELLET用BUFFER溶解,先用PIPET轻轻
把PELLET打碎成小碎片,然后在37C超声水槽里超声,最后还是有微小的蛋白碎片怎么
都不溶解,测了OD280=2左右,也不算很浓啊,这个浓度的时候这个蛋白一般都是溶解
的,测了PH也没有问题。请问该如何让蛋白完全溶解阿?
把PELLET打碎成小碎片,然后在37C超声水槽里超声,最后还是有微小的蛋白碎片怎么
都不溶解,测了OD280=2左右,也不算很浓啊,这个浓度的时候这个蛋白一般都是溶解
的,测了PH也没有问题。请问该如何让蛋白完全溶解阿?
s*n
5 楼
大师回国了?
l*n
6 楼
确实挺那什么的,男子气概
m*n
7 楼
我一眼看见就发现了,演技真差。。
D*9
10 楼
yes, you have to remove salt first, I used to dialyze my protein at 4
degree overnight
degree overnight
m*m
12 楼
The reason why I didn't dialysis is that my protein is a hydrophobic
membrane protein which is desolved in an expensive detergent. If I dialysis,
the detergent will also go away and my protein will precipitate anyway.
I wonder if there's any other way to concentrate protein except using this
method and centrifuge through a membrane to get rid of the water? The later
is not so efficient, because I see some protein also pass the membrane which
causes loss.
Can we use vaccum dry under low temperatu
membrane protein which is desolved in an expensive detergent. If I dialysis,
the detergent will also go away and my protein will precipitate anyway.
I wonder if there's any other way to concentrate protein except using this
method and centrifuge through a membrane to get rid of the water? The later
is not so efficient, because I see some protein also pass the membrane which
causes loss.
Can we use vaccum dry under low temperatu
m*m
14 楼
dd,,,,,,,,
s*y
15 楼
这几种方法你都可以试一下。没有哪一个是肯定保险的。
至于说用concentrator会损失蛋白?这个可能是因为你没有选对大小合适
的滤膜。一般来说,滤膜的孔的标定尺寸应该比你的蛋白的真正尺寸小
三倍。比方说30K 的蛋白必须用小于10K MWCO的膜,否则蛋白有可能漏过去。
另外,在dialysis 的时候,你可以在外面的溶液里也放上detergent 啊,
我不明白这个为什么会是问题。而且,一般来说,detergent 在溶液里
会形成微团,所以不会容易的透过滤膜
dialysis,
later
which
【在 m****m 的大作中提到】
: The reason why I didn't dialysis is that my protein is a hydrophobic
: membrane protein which is desolved in an expensive detergent. If I dialysis,
: the detergent will also go away and my protein will precipitate anyway.
: I wonder if there's any other way to concentrate protein except using this
: method and centrifuge through a membrane to get rid of the water? The later
: is not so efficient, because I see some protein also pass the membrane which
: causes loss.
: Can we use vaccum dry under low temperatu
至于说用concentrator会损失蛋白?这个可能是因为你没有选对大小合适
的滤膜。一般来说,滤膜的孔的标定尺寸应该比你的蛋白的真正尺寸小
三倍。比方说30K 的蛋白必须用小于10K MWCO的膜,否则蛋白有可能漏过去。
另外,在dialysis 的时候,你可以在外面的溶液里也放上detergent 啊,
我不明白这个为什么会是问题。而且,一般来说,detergent 在溶液里
会形成微团,所以不会容易的透过滤膜
dialysis,
later
which
【在 m****m 的大作中提到】
: The reason why I didn't dialysis is that my protein is a hydrophobic
: membrane protein which is desolved in an expensive detergent. If I dialysis,
: the detergent will also go away and my protein will precipitate anyway.
: I wonder if there's any other way to concentrate protein except using this
: method and centrifuge through a membrane to get rid of the water? The later
: is not so efficient, because I see some protein also pass the membrane which
: causes loss.
: Can we use vaccum dry under low temperatu
a*o
16 楼
如果已经是纯化的蛋白,就不用硫酸铵了吧,这个主要是分离用的
可以用乙醇或TCA, 不知道会不会好溶,没经验
可以用乙醇或TCA, 不知道会不会好溶,没经验
m*m
22 楼
难道就没有一个既好用又省事的浓缩蛋白的方法吗?可以真空抽吗,弄掉些水分就好阿
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