Nucleotide And Amino Acid Symbols
This page lists valid symbols for nucleotides and amino acids.
Nucleotides
Section titled “Nucleotides”| Symbol | Meaning | Ambiguous Symbol | | ------ | ----------------- | ---------------- | | A | Adenine | | | C | Cytosine | | | G | Guanine | | | T | Thymine | | | - | Deletion | | | N | failed read / any | | | R | A or G | ✔ | | Y | C or T | ✔ | | S | C or G | ✔ | | W | A or T | ✔ | | K | G or T | ✔ | | M | A or C | ✔ | | B | not A | ✔ | | D | not C | ✔ | | H | not G | ✔ | | V | not T | ✔ |
Amino Acids
Section titled “Amino Acids”| Symbol | Meaning | Ambiguous Symbol | | ------ | --------------------------- | ---------------- | | - | Deletion | | | A | Alanine | | | C | Cysteine | | | D | Aspartic Acid | | | E | Glutamic Acid | | | F | Phenylalanine | | | G | Glycine | | | H | Histidine | | | I | Isoleucine | | | K | Lysine | | | L | Leucine | | | M | Methionine | | | N | Asparagine | | | P | Proline | | | Q | Glutamine | | | R | Arginine | | | S | Serine | | | T | Threonine | | | V | Valine | | | W | Tryptophan | | | Y | Tyrosine | | | * | Stop codon | | | B | Aspartic Acid or Asparagine | ✔ | | Z | Glutamine or Glutamic Acid | ✔ | | X | Any amino acid | ✔ |