Predicted to enable RS domain binding activity and pre-mRNA 3'-splice site binding activity. Predicted to be involved in mRNA splicing, via spliceosome. Predicted to be located in nuclear speck. Predicted to be part of U2AF complex and catalytic step 2 spliceosome. Orthologous to human U2AF1 (U2 small nuclear RNA auxiliary factor 1). [provided by Alliance of Genome Resources, Apr 2022]