Subject: Helping FlyBase: ADRC-676C Dear Dr. Schupbach, (Pittsburgh) Annual Drosophila Research Conference, for FlyBase. I am writing in connection with your abstract: 'Identification and characterization of gritz, a novel putative ligand for the Drosophila Egf receptor.' You mention a gene that is new to FlyBase, gritz. Do you have a map location for gritz? This is a data class we like to track, if possible. I am writing to you because the first author does not have an address in FlyBase - please feel free to pass my query on if there is someone better placed to answer it. Thank you for your help, with best wishes, Rachel. Subject: RE: Helping FlyBase: ADRC-676C Dear Rachel, We localized gritz by polytene in situ hybridization to 74EF, it is deleted by the Deficiency Df(3L)81k19. We don't have a mutant phenotype yet, so have not localized it by traditional genetic mapping. I hope this helps. Yours, Trudi Schupbach