Predicted to enable fibroblast growth factor binding activity and fibroblast growth factor receptor binding activity. Acts upstream of or within positive regulation of MAPKKK cascade by fibroblast growth factor receptor signaling pathway and positive regulation of cell population proliferation. Predicted to be integral component of membrane. Is expressed in several structures, including extraembryonic component; gut; liver; lung; and trunk mesenchyme. Orthologous to human KLB (klotho beta). [provided by Alliance of Genome Resources, Apr 2022]