Involved in heart development; negative regulation of transcription by RNA polymerase II; and pharyngeal system development. Acts upstream of or within negative regulation of cell population proliferation. Predicted to be active in nucleus. Is expressed in several structures, including alimentary system; genitourinary system; heart; nervous system; and sensory organ. Orthologous to human RIPPLY3 (ripply transcriptional repressor 3). [provided by Alliance of Genome Resources, Apr 2022]