reduce to AA #347
Description
Given an input allele, reduce to AA sequence.
This requires download hla.xml which is big (e.g. 3.56.0 is 218M) so it should be optional (only if this mode is used, then download that version, load it into sqlite3, etc.)
Could use the convention of SSHAARP (DRB1*26F~28E~30Y) and tilde separate. Or better yet, don't because tilde is the overloaded.
Maybe ":" e.g. DRB1*26F:28E:30Y
could use a python port of github.com/nmdp-bioinformatics/imgt2aa to parse and load the AA data
might need options for which exons to include (e.g. exon 1 for class 2, exon 4 for class 1) outside ARD.
But the default behavior would be ARD exons.