A study of T cells from the blood and synovial fluid of psoriatic arthritis patients revealed the expression of YWHAZP3 and YWHAZP10 in both leukocytes and T cells; the expression of YWHAZP1, YWHAZP5, and YWHAZP6 in leukocytes only; the expression of YWHAZP2 in T Cells only [59]. The gene discussed is YWHAZP5; the disease is psoriatic arthritis.