Enables protein C-terminus binding activity. Involved in negative regulation of transcription, DNA-templated. Located in cytoplasm and nucleus. Part of transcription repressor complex. Used to study visual epilepsy. Biomarker of brain ischemia. Orthologous to human YWHAB (tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein beta). [provided by Alliance of Genome Resources, Apr 2022]