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logo.gif (3296 bytes)Introduction to Protein Structure

Non-polar Amino Acids

The side chains (R groups) of the amino acids can be divided into two major classes, those with non-polar side chains (shown here) and those with polar side chains.

Non polar side chains consist mainly of hydrocarbon. Any functional groups they contain are uncharged at physiological pH and are incapable of participating in hydrogen bonding.

The non-polar amino acids (shown here) include: alanine, cysteine, glycine, isoleucine, leucine, methionine, phenylalanine, proline, tryptophan, tyrosine and valine.

Name 3 letter code 1 letter code

2-D Structure

 3-D Structure
 

Alanine

  

Ala

  

A

wpe12.jpg (2184 bytes)

Ca:  

Model:  

 

Cysteine

  

Cys

  

C

wpe1B.jpg (2400 bytes)

Ca:  

Model:  

 

Glycine

  

Gly

  

G

wpe13.jpg (2079 bytes)

Ca:  

Model:  

 
 

Isoleucine

  

Ile

  

I

 wpe16.jpg (2947 bytes)

Ca:  

Model:  

 
 

Leucine

  

Leu

  

L

 wpe15.jpg (2956 bytes)

Ca:  

Model:  

 
 

Methionine

  

Met

  

M

 wpe1C.jpg (3011 bytes)

Ca:  

Model:  

 
 

Phenylalanine

  

Phe

  

F

 wpe17.jpg (2975 bytes)

Ca:  

Model:  

 
 

Proline

  

Pro

  

P

 wpe1A.jpg (2107 bytes)

Ca:  

Model:  

 
 

Tryptophan

  

Trp

  

W

 wpe18.jpg (3580 bytes)

Ca:  

Model:  

 
 

Tyrosine

  

Tyr

  

Y

 wpe19.jpg (3196 bytes)

Ca:  

Model:  

 
 

Valine

  

Val

  

V

 wpe14.jpg (2676 bytes)

Ca:  

Model:  

 

Copyright � 1998, 1999 by Frank R. Gorga;   Page maintained by F.R. Gorga;   Last updated: 03/05/01