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(C) Copyright 2008-2022
Dominic John Repici
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Amino Acid

 
The precursor molecules used by a cell's molecular machinery to construct proteins and enzymes. There are twenty-two twenty (22 20) standard (i.e., proteinogenic) amino acids from which all proteins are constructed.



Amino Acid 3-Ltr Code 1-Ltr Code Non/Pol. S(S) P?(Y) e(+/-/)
alanine Ala A N      
arginine Arg R P      + 
asparagine Asn N P      
aspartic acid Asp D P      - 
cysteine Cys C P S    
glutamic acid Glu E P      - 
glutamine Gln Q P      
glycine Gly G N      
histidine His H P      + 
isoleucine Ile I N      
leucine Leu L N      
lysine Lys K P      + 
methionine Met M N S    
phenylalanine Phe F N      
proline Pro P N      
serine Ser S P   Y  
threonine Thr T P   Y  
tryptophan Trp W N      
tyrosine Tyr Y P   Y  
valine Val V N      
Pyrrolysine[1] Pyl O     +
Selenocysteine[2] Sec U P    

Columns:
  • Amino Acid: Full name of the amino acid
  • 3-Ltr Code: Three letter code for the amino acid
  • 1-Ltr Code: One letter code for the amino acid
  • Non/pol. An 'N' in this column denotes that the amino acid is Nonpolar (hydrophobic), otherwise it is Polar (hydrophilic)
  • S An 'S' in the column indicates that the amino acid contains sulfur.
  • P? A 'Y' (yes) in this column indicates that the amino acids can be phosphorylated
  • e(+/-/) Indicates the electrical charge, if any, of the amino acid



[1] Not found in humans. Discovered in 2002
[2] Discovered in 1986








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Also: Ribosome        

 
 


































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