We used the following antibodies: anti-Flag M2 (F3165) (Sigma-Aldrich, St Louis, MO), mouse anti-Myc (sc-40), rabbit anti-Myc (sc-789), mouse anti-HA (sc-805), anti-Parp1 (sc-25780), mouse anti-TRAF3 (sc-6933), rabbit anti-TRAF3 (sc-1828), anti-p65 (sc-8008) (Santa Cruz Biotechnology, Santa Cruz, CA), anti-NIK (4994), anti-p52 (4882), anti-RelB (4922s) (Cell Signaling, Beverly, MA), anti-CnAα (07-067), anti-CnAβ (07-068), anti-tubulin (CP06) (Millipore, Darmstadt, Germany). The following reagents used were in experiments: MG132 (Peptide Institute, Osaka, Japan) and an agonistic anti-LtβR antibody (Alexis Biochemicals, Läufelfingen, Switzerland).
In vitro virus selection was performed as reported previously22 (link). Briefly, a cDNA library was prepared from mouse fetal thymus RNA (embryonic day 18.5). NIK mRNA was used as bait, and prey were co-translated in a wheat germ extract (Molecuence, Yokohama, Japan) using a Qiagen Biorobot 8000. After four rounds of selection, we identified interaction sequence tags obtained by in vitro virus and verified them as reported previously23 (link)40 (link).
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