RT-PCR analysis of the expression of IL-2R and control β-actin in GL from 4 LDGL patients. Lane 1, molecular weight marker (φl74 Hae-digested); lane 2, control PBMC stimulated for 12 hours with PHA (5 μg/mL); lane 3, negative control (sample without cDNA); lanes 4 and 5, 2 CD3⁺ LDGL cases (cases no. 3 and 5 in Table 1); lanes 6 and 7, 2 CD3⁻ LDGL (cases no. 10 and 11 in Table 1).