passages.id: split_1_test_2581_passage
passages.type: progene_text
passages.text: In this work we report that subjects with activating KIR2DS1 and/or KIR2DS2 genes are susceptible to developing psoriatic arthritis , but only when HLA ligands for their homologous inhibitory receptors , KIR2DL1 and KIR2DL2 / 3 , are missing .