Quantitative (q)-RT-PCR assays were performed as described (6 (link)) except that primers for 18S rRNA were used (10 (link)) to normalize samples. Quantitative circle transcript (CT) RT-PCR
assays were carried out as described (11 (link)) with
modifications. Primers γ2bF and γ3R were used for Iγ2b-Cγ3
CT assays (Table 1). Iγ2b-Cμ CTs
were detected using the Iγ2bF and CμR.1 primers (12 (link)) (Table 1). Semi-quantitative
RT-PCR for Iε−Cμ CTs was performed using primers IεF and
CμR with Phire Hot Start II polymerase (Thermo Scientific) and an initial
denaturation for 5 min at 98°C followed by 34 cycles of, 98°C for 5 sec,
60°C for 5 sec, 72°C for 8 sec, both in a 25 ul reaction on 5 fold serial
diluted cDNA. 3D DNA FISH was carried out as described (13 (link)).