The Genetic Code

5' Base                                                3' Base
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     |   U       |    C     |    A       |     G      |
     |    _      |          |    _       |     _      | 
U    | UUU |=Phe | UCU      | UAU |=Tyr  |  UGU |=Cys |    U
     | UUC_|     | UCC =Ser | UAC_|      |  UGC_|     |    C
     | UUA |=Leu | UCA      | UAA |=Stop |  UGA =Stop |    A
     | UUG_|     | UCG      | UAG_|      |  UGG =Trp  |    G
     |           |          |    _       |            |       
C    | CUU       | CCU      | CAU |=His  |  CGU       |    U
     | CUC =Leu  | CCC =Pro | CAC_|      |  CGC =Arg  |    C
     | CUA       | CCA      | CAA |=Gin  |  CGA       |    A
     | CUG       | CCG      | CAG_|      |  CGG       |    G
     |    _      |          |    _       |     _      |     
A    | AUU |     | ACU      | AAU |=Asn  |  AGU |=Ser |    U
     | AUC |=Ile | ACC =Thr | AAC_|      |  AGC_|     |    C
     | AUA_|     | ACA      | AAA |=Lys  |  AGA |=Arg |    A
     | AUG  =Met | ACG      | AAG_|      |  AGG_|     |    G
     |           |          |            |            |
G    | GUU       | GCU      | GAU |=Asp  |  GGU       |    U
     | GUC =Val  | GCC =Ala | GAC_|      |  GGC =Gly  |    C
     | GUA       | GCA      | GAA =Glu   |  GGA       |    A
     | GUG       | GCG      | GAG        |  GGG       |    G
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