Centrioles in Fruit Flies Cells (IMAGE) Instituto Gulbenkian de Ciencia Caption Images of a sperm-precursor cell from the fruit fly, Drosophila melanogaster. A) Cells with normal levels of PLK4 protein have four centrioles (green); B) Cells with higher levels of PLK4 protein have extra-number of centrioles. Green and blue colors represent centrioles and DNA, respectively. Credit Swadhin Jana, IGC. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.