Enables chromatin binding activity. Acts upstream of or within several processes, including double-strand break repair via homologous recombination; homeostasis of number of cells within a tissue; and in utero embryonic development. Located in lateral element and male germ cell nucleus. Is expressed in respiratory system; submandibular gland; testis; and ventricular layer. Orthologous to human RPA1 (replication protein A1). [provided by Alliance of Genome Resources, Apr 2022]