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Posts: 3560
13 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
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wrote...
13 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.

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