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  2. Amino acid - Wikipedia

    en.wikipedia.org/wiki/Amino_acid

    The one-letter notation was chosen by IUPAC-IUB based on the following rules: [47] ... In addition to the specific amino acid codes, ...

  3. FASTA format - Wikipedia

    en.wikipedia.org/wiki/FASTA_format

    In bioinformatics and biochemistry, the FASTA format is a text-based format for representing either nucleotide sequences or amino acid (protein) sequences, in which nucleotides or amino acids are represented using single-letter codes. The format allows for sequence names and comments to precede the sequences.

  4. Genetic code - Wikipedia

    en.wikipedia.org/wiki/Genetic_code

    If amino acids were randomly assigned to triplet codons, there would be 1.5 × 10 84 possible genetic codes. [81]: 163 This number is found by calculating the number of ways that 21 items (20 amino acids plus one stop) can be placed in 64 bins, wherein each item is used at least once. [82]

  5. DNA and RNA codon tables - Wikipedia

    en.wikipedia.org/wiki/DNA_and_RNA_codon_tables

    The second table, appropriately called the inverse, does the opposite: it can be used to deduce a possible triplet code if the amino acid is known. As multiple codons can code for the same amino acid, the International Union of Pure and Applied Chemistry's (IUPAC) nucleic acid notation is given in some instances.

  6. Proteinogenic amino acid - Wikipedia

    en.wikipedia.org/wiki/Proteinogenic_amino_acid

    The origin of the single-letter code for the amino acids This page was last edited on 23 January 2025, at 14:15 (UTC). Text is available under the Creative ...

  7. Protein primary structure - Wikipedia

    en.wikipedia.org/wiki/Protein_primary_structure

    Protein sequence is typically notated as a string of letters, listing the amino acids starting at the amino-terminal end through to the carboxyl-terminal end. Either a three letter code or single letter code can be used to represent the 22 naturally encoded amino acids, as well as mixtures or ambiguous amino acids (similar to nucleic acid ...

  8. Scientists Say We May Have Been Wrong About the Origin of Life

    www.aol.com/lifestyle/scientists-may-wrong...

    One big paradigm shift proposed by ... (its letter designation is W). “[T]here is scientific consensus that W was the last of the 20 canonical amino acids to be added to the genetic code,” the ...

  9. List of genetic codes - Wikipedia

    en.wikipedia.org/wiki/List_of_genetic_codes

    The euplotid nuclear code; The bacterial, archaeal and plant plastid code; The alternative yeast nuclear code; The ascidian mitochondrial code; The alternative flatworm mitochondrial code; The Blepharisma nuclear code [4] The chlorophycean mitochondrial code (none) (none) (none) (none) The trematode mitochondrial code; The Scenedesmus obliquus ...