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* If an indel is not left aligned or not right parsimonious then each allele ends with the same type of nucleotide.
* If an indel is not left aligned or not right parsimonious then each allele ends with the same type of nucleotide.
Suppose a variant is not left aligned, then it must be possible to extend the alleles one nucleotide to the left and remove one nucleotide from the right to endure that all the alleles remain the same length. Thus each allele must end with the same type of nucleotide for the removal of the rightmost nucleotide to be possible.
Suppose a variant is not left aligned, then it must be possible to extend the alleles one nucleotide to the left and remove one nucleotide from the right to ensure that all the alleles remain the same length. Thus each allele must end with the same type of nucleotide for the removal of the rightmost nucleotide to be possible.
Suppose a variant is not right parsimonious, then for sure, all the alleles have length greater than one and by definition, the right most nucleotide is the same for all alleles and may be removed.
Suppose a variant is not right parsimonious, then by definition, the rightmost nucleotide is the same for all alleles which may be removed.
== Corollary ==
== Corollary ==
