Figure EV5. The HdcK305G mutant cannot synthesize histamine.
(A) Immunostaining of mCherry in trp-hHdc-mCherry and trp-hHdcK305G-mCherry flies revealed no changes in the distribution and levels of ectopic hHdc proteins. hHdc-mCherry vs hHdcK305G-mCherry p = 0.1738. Unpaired t-test, n = 3, mean ± sd. (B) Histamine was immunolabeled in horizontal sections of heads of trp-hHdc-mCherry and trp-hHdcK305G-mCherry flies. Quantification of histamine fluorescence intensity ratios between the entire lamina and retina were based on three sections. hHdc-mCherry vs hHdcK305G-mCherry **p = 0.0028. Unpaired t-test, mean ± sd. (C) TEM images from wildtype and lovit1 flies that were 1 (upper) or 20 days old (bottom). Scale bar, 2 μm. Ten sections were used for quantification. wt vs lovit1 ****p < 0.0001. Unpaired t-test, mean ± sd.
