Promoter-driven co-expression of TH, AADC and SERT in the same cells of sensory vesicle. Views of heads of C. intestinalis larvae co-expressing CFP in TH cells (pSP-Ci-TH-CFP, a, d, g) and Kaede under the control of the AADC promoter (pSP-Ci-AADC-Kaede, b) GCH promoter (pSP-Ci-GCH-Kaede, e) or the SERT promoter (pSP-Ci-SERT-Kaede, h). Merged images (c, f, i) demonstrate the co-localization of TH, AADC, GCH and SERT-driven fluorescent reporters in the DA cells of the Ciona sensory vesicle. Ot, otolith and Oc, ocellus. Ant., anterior to the left, Post, posterior to the right for all the images.