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Provide the ability for a user to upload a dataset type of 'nucleotide_4_letter' as per other data types, similar to 'nucleotide_2_letter'.

User Story

As a GDM user, I want to be able to load a new dataset type,  'nucleotide_4_letter'

• new dataset type of 'nucleotide_4_letter'
  • available in the LoaderUI Drop down on the 'Create' dataset page
  • dataset type of 'nucleotide_4_letter'
  • added to the cv table with cvgroup_id = 1
• Contains exactly 4 elements
  • either 0 or 1 separator character between each element
    • allowed separators are:
      • ,
      • |
      • /
      • no separator
  • allowed values/alleles are
  • /
    • A
    • C
    • G
    • T
    • N
    • +
    • -
    • anything in the missingIndicators.txt file
      • add ? to the above file
      • anything in this file that appears in the nucleotide_4_letter is to be changed to an N
      • found at: 
    • • http://gobiin1.bti.cornell.edu:6083/projects/GM/repos/gobiiscripts/browse/loaders/etc/missingIndicators.txt
• New type transformation in Digest/ExtractExtract similar to 'nucleotide_2_letter'.

Success metrics

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