A number or expression that is set lower than the baseline and slightly smaller, to act as an inferior or subscript


arrange Arrangement of Subscripts and Superscripts

Content Model

<!ELEMENT  sub          (#PCDATA %emphasized-text;)*                 >

Expanded Content Model

(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | bold | italic | monospace | overline | roman | sc | strike | underline | alternatives | inline-graphic | chem-struct | inline-formula | abbrev | named-content | styled-content | fn | target | xref | sub | sup)*


Any combination of:

This element may be contained in:

<addr-line>, <aff>, <article-title>, <attrib>, <bold>, <chapter-title>, <chem-struct>, <collab>, <comment>, <conf-theme>, <copyright-holder>, <copyright-statement>, <def-head>, <disp-formula>, <element-citation>, <ext-link>, <funding-statement>, <gov>, <inline-formula>, <inline-supplementary-material>, <institution>, <italic>, <kwd>, <license-p>, <mixed-citation>, <monospace>, <named-content>, <on-behalf-of>, <overline>, <p>, <part-title>, <preformat>, <product>, <related-article>, <related-object>, <roman>, <sc>, <series>, <source>, <std>, <strike>, <styled-content>, <sub>, <subtitle>, <sup>, <supplement>, <target>, <td>, <term>, <term-head>, <textual-form>, <th>, <title>, <trans-source>, <trans-title>, <underline>, <verse-line>, <xref>

Example 1

An ordinary subscript:

<p>This article by Peter Wilmshurst (10 October 1998, pp 996-9) 
used the incorrect abbreviation for inspired partial pressure 
of oxygen. The abbreviation should have been Pi<sc>o</sc><sub>2</sub> 
not Fi<sc>o</sc><sub>2</sub>.</p>

Example 2

As shown formatted above, a subscript and superscript in a “stacked ” arrangement:

<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>