UBIAD1 and neoplasm: In our study of the Drosophila heix gene, which encodes an ortholog of human UBIAD1, we observed a correlation between the malignant blood tumor phenotype and an increased number of Drosophila blood cells carrying mutant nonfunctional heix. This is consistent with the role of UBIAD1 being a bona fide tumor suppressor [2], [14].