Predicted to enable SH2 domain binding activity and protein kinase binding activity. Acts upstream of or within antigen receptor-mediated signaling pathway and lymphocyte activation. Predicted to be located in Golgi apparatus and cytosol. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Orthologous to human LAX1 (lymphocyte transmembrane adaptor 1). [provided by Alliance of Genome Resources, Apr 2022]