Carries a genomic fragment of the cnn locus from (BAC CH322-189K22 from the CHORI BacPac library collection, https://bacpac.chori.org). Recombineering is used to fuse eGFP to the initiating methionine of exon 1A in the genomic BAC.
cnnT:Avic\GFP-EGFP rescues the cnnHK21 phenotype, with hatching rates of 51.5%, and restores fertility to both males and females.