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Notation forms will use a common prefix notation. These describe the units of any positions given in the variant description. For example, protein notation (p.) would have amino acids as units.

Prefix Coordinate Type Standard HGVS
g Genomic
c Coding reference sequence (CDS)
p Protein
e Exon
y CytoBand/Cytogenic
i Intronic position
r RNA position
n non-coding DNA reference sequence
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