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gavinmcgimpsey/protein_translation.rb

Created January 14, 2016 21:46
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  1. gavinmcgimpsey created this gist Jan 14, 2016.
    43 changes: 43 additions & 0 deletions protein_translation.rb
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,43 @@
    class InvalidCodonError < ArgumentError; end

    module Translation
    def self.of_rna(string)
    result = []
    tris = string.chars
    .each_slice(3)
    .to_a
    .map(&:join)

    tris.each do |tri|
    next_codon = of_codon(tri)

    break if next_codon == 'STOP'
    result << next_codon
    end

    result
    end

    def self.of_codon(tri)
    case tri
    when 'AUG'
    'Methionine'
    when 'UUU', 'UUC'
    'Phenylalanine'
    when 'UUA', 'UUG'
    'Leucine'
    when 'UCU', 'UCC', 'UCA', 'UCG'
    'Serine'
    when 'UAU', 'UAC'
    'Tyrosine'
    when 'UGU', 'UGC'
    'Cysteine'
    when 'UGG'
    'Tryptophan'
    when 'UAA', 'UAG', 'UGA'
    'STOP'
    else
    fail InvalidCodonError
    end
    end
    end