Re: [转载] 钾通道水通道的结构解析真的终结争论了么？# Biology - 生物学
w*h
1 楼
hydrated ion diameter.
according to the book,
hydrated K+: 3.8 A
hydrated Na+: 5 A
according to the book,
hydrated K+: 3.8 A
hydrated Na+: 5 A
v*n
2 楼
First, ion is translocated within the conducting duct as dehydrated form.
Theerefore the ion selectivity is actually determined by both protein and ion
properties.
The reaction can be simplified as (alkaline metal, for example; A stands for
the amino residue that binds to ion):
Li (H2O)n + A ---> LiA + nH2O
This reaction depends on:
1. dehydration energy of the hydrated ion, for which the order is: Li > Na > K
> Rb > Cs, determined mainly by the electric strength of naked ion. It is also
depi
【在 w********h 的大作中提到】
: hydrated ion diameter.
: according to the book,
: hydrated K+: 3.8 A
: hydrated Na+: 5 A
Theerefore the ion selectivity is actually determined by both protein and ion
properties.
The reaction can be simplified as (alkaline metal, for example; A stands for
the amino residue that binds to ion):
Li (H2O)n + A ---> LiA + nH2O
This reaction depends on:
1. dehydration energy of the hydrated ion, for which the order is: Li > Na > K
> Rb > Cs, determined mainly by the electric strength of naked ion. It is also
depi
【在 w********h 的大作中提到】
: hydrated ion diameter.
: according to the book,
: hydrated K+: 3.8 A
: hydrated Na+: 5 A
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