|stack||The multiple subscripts or superscripts should be placed one above the other as compactly as possible.|
|stagger||The multiple subscripts or superscripts should be stretched out in a line.|
... <p>The <italic>Escherichia coli argU</italic> gene encodes a minor arginine tRNA, tRNA<sup arrange="stack">Arg</sup><sub arrange="stack">UCU</sub>, which corresponds to the rare codon AGA and possibly AGG ...</p> ...
Journal Archiving and Interchange Tag Library NISO JATS Draft Version 1.1d2
Version of December 2014