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\stoptext
\starttext
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Cropped examples added further information provided by Rik offlist
[characters=all,
alternative=dna]
\startframedtext[width=6cm,style=mono]
GATTGCTTACTCCTGGTTGGTGGGGCTTACATTCTGTCGCCTCAAAACTACTAGAGCCGGCATATTCTAGAAGGGCCGCCTTCATGTGG
\stopframedtext
</context>
And a solution using a bit of plain TeX {{cmd|handletokens}} by Rik:
<context source="yes">
\define[1]\DNA{\handletokens #1\with\DNAspacer}
\define[1]\DNAspacer{#1\hskip 2.3pt plus .1pt}
\startframedtext[width=6cm,style=mono]
\stopframedtext
</context>
One caveat, however: this method always adds the spacer value, and can result in a blank line at the end in some cases, even when the spacer value is zero. This is not the case with the lua mechanism.
== See also ==
