Enables single-stranded DNA binding activity. Involved in double-strand break repair via alternative nonhomologous end joining and positive regulation of isotype switching. Predicted to be located in replication fork. Is expressed in several structures, including adipose tissue; genitourinary system; gut; hemolymphoid system gland; and liver. Orthologous to human HMCES (5-hydroxymethylcytosine binding, ES cell specific). [provided by Alliance of Genome Resources, Apr 2022]