###### Asked in Math and ArithmeticGeneticsBiochemistry

Math and Arithmetic

Genetics

Biochemistry

# How do you find out the length of alpha -helix and beta -helix?

## Answer

###### Wiki User

###### April 14, 2008 1:08AM

This is quite simple. Using stoichiometry to keep track of units, simply take the number of amino acids in the particular alpha helix and multiply by 15 angstroms. This is the length the alpha helix is advanced along the length axis by each additional A.A. For a beta helix it become more difficult however and you must know how many sheets you are taking into account.

## Related Questions

###### Asked in Math and Arithmetic, Algebra, Geometry

### Find the missing angles for triangle ABC given that a equals 24 b equals 36 and c equals 19?

Trig. Use law of cosines in degree mode.
First find alpha; the angle opposite a
a^2 = b^2 + c^2 - 2bc*cos(alpha)
24^2 = 36^2 + 19^2 - 2(36)(19)cos(alpha)
576 = 1657 - 1368cos(alpha)
subtract 1657 from both sides( order of operations )
-1088 = -1368cos(alpha)
0.7902046784 = cos(alpha)
arccos(0.7902046784) = alpha
38 degrees = alpha ( angle opposite side a )
find beta; angle opposite side b
b^2 = a^2 + c^2 - 2ac*cos(beta)
1296 = 937 - 912cos(beta)
359 = -912cos(beta)
-0.3936403509 = cos(beta)
arcos(-0.3936403509 = beta
113 degrees = beta ( angle opposite of b )
easy thing to get last angle
180 degrees - 38 degrees - 113 degrees
= 29 degrees; which is gamma; angle opposite c
alpha( angle opposite a side = 38 degrees
beta( angle opposite b side ) = 113 degrees
gamma(angle opposite c side) = 29 degrees

###### Asked in Statistics, Adventure Quest

### What is alpha and beta testing?

Simple my fellow gamer. Beta is the beginning of a computer game
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The cycle: Beta → Alpha → Gamma
Alpha and Beta Testing
If software is developed as a product to be used by many
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The alpha test is conducted at the developer's site by a
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Alpha tests are conducted in a controlled environment.
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The customer records all problems (real/imagined) that are
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###### Asked in Geometry, Trigonometry

### What is the approximate size of the smallest angle of a triangle whose sides are 4 5 and 8?

Why approximate? I will show you what you should know being in
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a = 4 (angle opposite = alpha)
b = 5 ( angle opposite = beta)
c = 8 ( angle opposite = gamma )
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-73 = -80 cos(alpha)
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arcos(0.9125) = alpha
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------------------------------
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---------------------------------
Now to find gamma, subtract from 180 degrees
180 - 24.15 - 30.75
= 125.1 degrees
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degrees )
beta = 30.75 degrees
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( be in degree mode!!)

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Alpha particals, beta particles and gamma rays are all forms of
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### What is the difference between alpha and omega wolves?

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Alphas: There is an Alpha Male and an Alpha Female in a pack.
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around, but as soon as the Alphas return, the Beta is not in
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###### Asked in Wolves

### In a wolf pack what does an omega do?

People studying wolf packs use the Greek Alphabet to describe
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