Predicted to enable chondroitin 4-sulfotransferase activity. Predicted to be involved in chondroitin sulfate biosynthetic process and dermatan sulfate biosynthetic process. Predicted to act upstream of or within carbohydrate metabolic process. Predicted to be located in Golgi apparatus and membrane. Predicted to be integral component of membrane. Is expressed in several structures, including alimentary system; clavicle; naris; telencephalon; and viscerocranium. Orthologous to human CHST12 (carbohydrate sulfotransferase 12). [provided by Alliance of Genome Resources, Apr 2022]