Enables RNA stem-loop binding activity. Acts upstream of or within several processes, including maternal placenta development; positive regulation of mRNA splicing, via spliceosome; and spermatogenesis. Located in cytoplasm and nucleus. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Orthologous to human DAZAP1 (DAZ associated protein 1). [provided by Alliance of Genome Resources, Apr 2022]