Wikipedia
Extramacrochaetae
The gene extramachrochaetae (emc) is a Drosophila melanogaster gene that codes for the Emc protein, which has a wide variety of developmental roles. It was named, as is common for Drosophila genes, after the phenotypic change caused by a mutation in the gene ( macrochaetae are the longer bristles on Drosophila).