Enables IMP dehydrogenase activity and identical protein binding activity. Involved in purine nucleotide biosynthetic process and retina development in camera-type eye. Predicted to be located in cytosol and nucleus. Predicted to be active in cytoplasm. Orthologous to human IMPDH2 (inosine monophosphate dehydrogenase 2). [provided by Alliance of Genome Resources, Apr 2022]