One gene and one pseudogene for the cytokeratin endo A.

Abstract
The recombinant c[combinant]DNA RecXVI, which hybridizes to the endo A mRNA, detects 2 specific bands on a Southern blot of EcoRI-digested genomic mouse DNA. A mouse genomic library was screened with this cDNA and isolated these 2 sequences. Endo A is encoded by a 7.5-kilobase gene and by a 1.6-kilobase pseudogene devoid of introns. A repetitive sequence belonging to the B2 family is located in the 3rd intron of the gene. Transcription of B2 sequences and of the endo A gene are mutually exclusive.