Beta data warning:

You are currently visiting the beta server for the IMPC. This site is stable but is displaying test data. To access the live data from the IMPC please visit

Help & Documentation

LacZ Expression Data

IMPC alleles may optionally be used to assess bacterial beta-galactosidase (lacZ) activity to determine tissue-specific gene expression in embryos and/or adults. Results are reported in the “Expression” section of the Gene page, in table format. Available images can be accessed through the links provided in the table, the “Images” button, or in the section “Associated Images”.

More on the lacZ procedure:

IMPC allele design

IMPC adult lacZ procedure

IMPC embryo lacZ procedure 

The IMPC Newsletter

Get highlights of the most important data releases, news and events, delivered straight to your email inbox

Subscribe to newsletter