Predicted to enable hormone activity and prolactin receptor binding activity. Predicted to be involved in several processes, including female pregnancy; positive regulation of lactation; and positive regulation of receptor signaling pathway via JAK-STAT. Located in extracellular space. Is expressed in several structures, including extraembryonic component; genitourinary system; and genitourinary system mesenchyme. [provided by Alliance of Genome Resources, Apr 2022]