expresses PPO2 PPO1 hemocyte crystal cell 2021-05-26T15:20:21Z fly_anatomy.ontology FBbt:00058147 Melanizing hemocyte. It has roughly the same size as a plasmatocyte but is distinguishable by its crystal inclusions of phenoloxidases (encoded by PPO1 and PPO2) that are necessary for the synthesis of melanin as part of the antimicrobial immune reaction (Wood and Jacinto, 2007; Honti et al., 2014; Cattenoz et al., 2020).