Receptor for interleukin-12. This subunit is the signaling component coupling to the JAK2/STAT4 pathway. Promotes the proliferation of T-cells as well as NK cells. Induces the promotion of T-cells towards the Th1 phenotype by strongly enhancing IFN-gamma production. This is the function of Ensembl gene identifier ENSG00000081985 (IL12RB2, interleukin 12 receptor subunit beta 2).