Blood cell proliferation driven by mutant Idh. (A) Melanotic masses in third instar larvae from hml-Gal4, UAS-2xEGFP (hml>+), hml-Gal4, UAS-2xEGFP; UAS-Idh-WT [2;3] (hml>Idh-WT), and hml-Gal4, UAS-2xEGFP; UAS-Idh-R195H [2;3] (hml>Idh-R195H). (B) Circulating GFP-positive hemocytes in hml>+, hml>Idh-WT, and hml>Idh-R195H larvae. (C) Quantitation of circulating hemocytes in hml>Idh-R195H larvae (n = 3; data are expressed as mean ± standard deviation). Drosophila were cultured at 29°C. Samples were visualized using a Nikon TE2000-E phase-contrast inverted epifluorescence microscope with a SensiCamQE camera, original magnification ×10, with MetaMorph, v6.2r6 software.