Involved in modulating alternative pre-mRNA splicing with either 5' distal site activation or preferential use of 3' proximal site. Interacts with ZCCHC17 (By similarity). Interacts with SRSF2 (By similarity). Interacts with ARL6. Widely expressed. Expressed at high level in testis and thymus. Belongs to the ARL6IP4 family. Low quality sequence that contains many discrepancies.