× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
w
5
a
3
j
2
a
2
t
2
u
2
r
2
j
2
j
2
l
2
d
2
y
2
New Topic  
ppk ppk
wrote...
Valued Member
On Hiatus
Posts: 3560
12 years ago
What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the ni = 2 to the nf = 1 state?
A) 205.2 nm
B) 87.5 nm
C) 91.2 nm
D) 121.5 nm
E) 402.1 nm
Read 1510 times
1 Reply

Related Topics

Replies
wrote...
12 years ago
Good question... Okay,

In general, transmembrane proteins (and some other tightly bound membrane proteins) can be solubilized only by agents that disrupt hydrophobic associations and destroy the lipid bilayer. The most useful of these for the membrane biochemist are detergents, which are small amphipathic molecules (Amphipathic lipids are molecules that are mostly lipid-like (hydrophobic) in structure, but at one end have a region that is polar or ionic (hydrophilic)).

When mixed with membranes, the hydrophobic ends of detergents bind to the hydrophobic regions of the membrane proteins, thereby displacing the lipid molecules. Since the other end of the detergent molecule is polar, this binding tends to bring the membrane proteins into solution as detergent-protein complexes (although some lipid molecules may remain attached to the protein).

The polar (hydrophilic) ends of detergents can be either charged (ionic), as in sodium dodecyl sulfate (SDS), or uncharged (nonionic), as in the Triton detergents.

See attachment
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1222 People Browsing
Related Images
  
 380
  
 921
  
 976
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 824