Subject: moira and 89B helicase FlyBase, We would like to submit the following correction as a personal communication to FlyBase: We have determined that the identification of 89B helicase as the product of the moira gene was in error (FBrf0090578). Please remove all references to 89B helicase from the moira record; 89B helicase is a new, previously unidentified gene. The GenBank accession number cited in the moira record is that of 89B helicase; it should also be deleted from the moira record and moved to the 89B helicase record. Sincerely, Naomi Zak Hubert H. Humphrey Center for Experimental Medicine and Cancer Research, Hebrew University-Hadassah Medical School Madeline Crosby Department of Molecular and Cellular Biology, Harvard University