What does the ">" symbol signify when interpreting genetic results?

In genetic nomenclature, the ">" is used to signify which allele is the ancestral (original) or "wild type" allele and which allele is the SNP (change present in 1%+ of the population) or "variant" allele. The ancestral allele is to the left of the ">" and the SNP allele is on the right.

In the example of MTHFR 677 C>T, C is the ancestral/wild type allele and the T allele is the SNP/variant allele.

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