The membrane protein bacteriorhodpsin, which contains seven transmembrane alpha helloes, was attached by its N-terminal to a glass slide, and the C-terminal chemically linked to a magnetic force microscope. The microscope tip was then pulled away from the slide. As it withdraws, a helices pul of the mebrane, two at a time, as shown in the figure, giving a force-extension curve with four teeth. ▼ w 400 This 20 Part A 1611 If the force required to extract the first pair of alpha helices in the example above is given by (f/pN) 20(z/nm) +(z/mm)2, up to an extension of 10 nm, what is the work needed to extract the first pair of helices? Express your answer to two significant figures and include the appropriate units. Submit w Value Part B 1 W 40 60 x (nm) A ^ Request Answer Value What would be the work in J needed to extract 1 mol of pairs of helices? Express your answer to two significant figures and include the appropriate units. HA A CE ? Submit Request Answer Units Units ?
The membrane protein bacteriorhodpsin, which contains seven transmembrane alpha helloes, was attached by its N-terminal to a glass slide, and the C-terminal chemically linked to a magnetic force microscope. The microscope tip was then pulled away from the slide. As it withdraws, a helices pul of the mebrane, two at a time, as shown in the figure, giving a force-extension curve with four teeth. ▼ w 400 This 20 Part A 1611 If the force required to extract the first pair of alpha helices in the example above is given by (f/pN) 20(z/nm) +(z/mm)2, up to an extension of 10 nm, what is the work needed to extract the first pair of helices? Express your answer to two significant figures and include the appropriate units. Submit w Value Part B 1 W 40 60 x (nm) A ^ Request Answer Value What would be the work in J needed to extract 1 mol of pairs of helices? Express your answer to two significant figures and include the appropriate units. HA A CE ? Submit Request Answer Units Units ?
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Transcribed Image Text:The membrane protein bacteriorhodpsin, which contains seven transmembrane alpha helices, was attached by its N-terminal to a glass slide, and the C-terminal chemically linked to a magnetic force microscope. The microscope tip was then pulled away from the slide. As it withdraws, a helices pull
of the mebrane, two at a time, as shown in the figure, giving a force-extension curve with four 'teeth'.
▼
400H
(Nd)/
▼ Part A
W=
m
Mi
20 40
Submit
Part B
b
If the force required to extract the first pair of alpha helices in the example above is given by (f/pN)=20(z/nm) +(z/nm)², up to an extension of 10 nm, what is the work needed to extract the first pair of helices?
Express your answer to two significant figures and include the appropriate units.
W =
Value
x (nm)
60
4
Request Answer
μA
Value
What would be the work in J needed to extract 1 mol of pairs of helices?
Express your answer to two significant figures and include the appropriate units.
Submit Request Answer
OFF ?
A
Units
13 ?
Units
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