The way, in the simplest terms that cyanide can kill you, is it basically out-competes your oxygen for the heme in your blood.
氰化物可以杀掉你的最简单的一种方式基本上就是,将氧从你血液中,的血红素中挤出去。
They're red because they contain a special protein called hemoglobin which is very concentrated inside the cell.
红细胞的红色源于,其内部一种叫做血红蛋白的特殊蛋白质,血红蛋白在细胞内的浓度很高
One example of a very different cell is a red cell or red blood cell, these are the cells that give blood it's red color.
举个高度分化细胞的例子,红细胞,或称血红细胞,它们赋予了血液鲜红的色彩
It's on the gene for hemoglobin and the hemoglobin that you produce if you have sickle cell anemia is not quite right because there's one base difference.
这个缺陷基因和血红蛋白有关,如果你有镰状红细胞贫血症,那你所产生的血红蛋白就不太正常,因为这里有一个碱基不同
Hemoglobin, as you know, is an oxygen carrier and so red blood cells concentrate in bags of hemoglobin which circulate in your blood and they carry oxygen.
众所周知,血红蛋白可以携带氧气,含有大量血红蛋白的红细胞,在全身循环,以携带氧气
Here's the difference between normal hemoglobin and sickle hemoglobin, I can make - I can see a chemical difference, I can exploit it, how can I find it?
正常血红蛋白和镰状红细胞贫血的,血红蛋白有不同之处,我能够--我能看出有化学差异,我能去探寻差异,那么我怎么找到它呢
Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.
我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的
If you have normal hemoglobin you have this sequence here, CCTGAGGAG.
正常血红蛋白的基因序列是这样的,CCTGAGGAG
In a normal cell DNA that DNA in the normal cell - this DNA gets cut by the restriction enzyme, so the sickle gene ends up - so that hemoglobin gene ends up in two pieces.
一个正常细胞的DNA,正常细胞里的DNA,会被限制酶所剪切,因此镰状血红蛋白基因--,不对,是正常血红蛋白基因被切成两段
应用推荐