A transfected C-terminally GFP-tagged form (Figure 6—figure supplement 1B) showed localization to the secretory pathway, colocalizing with the Golgi marker GRASP65 in murine MC-38 colon carcinoma, 4T1 breast cancer cells and LLC1.1 lung cancer (Figure 6B–C, Figure 6—figure supplement 1C–E) and with Golgi and endosomal markers in B16-BL6 melanoma cells (Figure 6C, Figure 6—figure supplement 1F). The gene discussed is GORASP1; the disease is breast cancer.