Enables protein domain specific binding activity. Acts upstream of or within protein targeting. Predicted to be located in cytosol; nucleus; and perinuclear region of cytoplasm. Predicted to be part of transcription repressor complex. Predicted to be active in cytoplasm. Is expressed in several structures, including genitourinary system; nervous system; palatal shelf; retina layer; and thymus. Orthologous to human YWHAB (tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein beta). [provided by Alliance of Genome Resources, Apr 2022]