Source:http://linkedlifedata.com/resource/umls/id/C0059944
NCI: Exonuclease 1, encoded by the EXO1 gene, is a 88-kD protein with 5-prime to 3-prime double strand DNA exonuclease activity as well as an RNase H activity. It is similar to the Saccharomyces cerevisiae protein Exo1 which interacts with Msh2 and which is involved in mismatch repair and recombination. Alternative splicing of this gene results in three transcript variants encoding two different protein isoforms, a and b. (From LocusLink)