Automated description from the Alliance of Genome Resources (Release 7.0.0)
Enables signaling receptor activity. Acts upstream of or within immune response-regulating cell surface receptor signaling pathway; negative regulation of B cell proliferation; and negative regulation of alpha-beta T cell proliferation. Located in external side of plasma membrane. Is expressed in adipose tissue; chondrocranium; femur; lung; and spleen. Orthologous to human BTLA (B and T lymphocyte associated).