 | This category is not shown on its member pages unless the appropriate user preference (appearance → show hidden categories) is set. |
 | Administrators: Please do not delete this category as empty! This category may be empty occasionally or even most of the time. |
This category lists articles using {{Infobox protein}}, {{Infobox protein family}} or {{Infobox nonhuman protein}}, which have no symbol entered (|Symbol=). The infobox actually shows "Symbol: ?". For further information see Wikiproject Molecular and Cellular Biology.