Text search

Select the Search tab of the toolbar to search this site:

Select a data set from the Search in drop-down list.
Enter your query in the Query field.
Click the Search button.

Query syntax

Here is a brief overview of the supported query syntax (see also query fields for UniProtKB):

human antigen All entries containing both terms.

human AND antigen

human && antigen

"human antigen" All entries containing both terms in the exact order.

human -antigen All entries containing the term human but not antigen.

human NOT antigen

human ! antigen

human OR mouse All entries containing either term.

human || mouse

antigen AND (human OR mouse) Using parentheses to override boolean precedence rules.

anti* All entries containing terms starting with anti. Asterisks can also be used at the beginning and within terms. Note: Terms starting with an asterisk or a single letter followed by an asterisk can slow down queries considerably.

author:Tiger* Citations that have an author whose name starts with Tiger. To search in a specific field of a dataset, you must prefix your search term with the field name and a colon. To discover what fields can be queried explicitly, observe the query hints that are shown after submitting a query or use the query builder (see below).

length:[100 TO *] All entries with a sequence of at least 100 amino acids.

citation:(author:Arai author:Chung) All entries with a publication that was coauthored by two specific authors.

To use characters that have a special meaning in the query syntax literally in your query, you must escape them with a backslash, e.g. use gene:L\(1\)2CB to search for the gene name L(1)2CB. The current list of special characters is:

+ - && || ! ( ) { } [ ] ^ " ~ * ? : \

Query builder

To restrict terms to specific fields in advance, click the 'Advanced Search »' button. Depending on the chosen data set and field, you can then enter some text or choose values from a drop-down list. Then click the Add & Search button to add the new constraint and run the new query.