LTβR signaling activates multiple NF-κB pathways. (A) LTβR activates distinct NF-κB complexes. MEFs from wild-type mice were stimulated with agonistic anti-LTβR antibody for the indicated times (hours) and subjected to a NF-κB EMSA. (B) LTβR signaling activates multiple NF-κB complexes. Extracts from 24-hour-stimulated WT MEFs were subject to supershift analysis with the indicated NF-κB antibodies.