Nucleotide Codes
AadenosineYT or C
CcytidineMA or C
GguanineWA or T
TthymidineRG or A
NA, G, C, or TBG, T, or C
Uuridine (matches T)DG, A, or T
KG or THA, C, or T
SG or CVG, C, or A

From: Entrez Sequences Quick Start

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Entrez Sequences Help [Internet].

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