Modified Base Abbreviations

Codes Used in Sequence Description

An example for description of the modified base in FEATURES line.

Example
FEATURES             Location/Qualifiers
     modified_base   15
                     /mod_base="m2g"
Abbreviation Modified base description
ac4c 4-acetylcytidine
chm5u 5-(carboxyhydroxylmethyl)uridine
cm 2'-O-methylcytidine
cmnm5s2u 5-carboxymethylaminomethyl-2-thiouridine
cmnm5u 5-carboxymethylaminomethyluridine
d dihydrouridine
fm 2'-O-methylpseudouridine
gal q beta,D-galactosylqueosine
gm 2'-O-methylguanosine
i inosine
i6a N6-isopentenyladenosine
m1a 1-methyladenosine
m1f 1-methylpseudouridine
m1g 1-methylguanosine
m1i 1-methylinosine
m22g 2,2-dimethylguanosine
m2a 2-methyladenosine
m2g 2-methylguanosine
m3c 3-methylcytidine
m5c 5-methylcytidine
m6a N6-methyladenosine
m7g 7-methylguanosine
mam5u 5-methylaminomethyluridine
mam5s2u 5-methoxyaminomethyl-2-thiouridine
man q beta,D-mannosylqueosine
mcm5s2u 5-methoxycarbonylmethyl-2-thiouridine
mcm5u 5-methoxycarbonylmethyluridine
mo5u 5-methoxyuridine
ms2i6a 2-methylthio-N6-isopentenyladenosine
ms2t6a N-((9-beta-D-ribofuranosyl-2-methyltiopurine-6-yl)carbamoyl)threonine
mt6a N-((9-beta-D-ribofuranosylpurine-6-yl)N-methyl-carbamoyl)threonine
mv uridine-5-oxyacetic acid-methylester
o5u uridine-5-oxyacetic acid (v)
osyw wybutoxosine
p pseudouridine
q queosine
s2c 2-thiocytidine
s2t 5-methyl-2-thiouridine
s2u 2-thiouridine
s4u 4-thiouridine
m5u 5-methyluridine
t6a N-((9-beta-D-ribofuranosylpurine-6-yl)carbamoyl)threonine
tm 2'-O-methyl-5-methyluridine
um 2'-O-methyluridine
yw wybutosine
x 3-(3-amino-3-carboxypropyl)uridine, (acp3)u
OTHER Other
(Modified base not found in this list can be annotated by using 'note' qualifier)
References
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