ACTN1 and cervical carcinoma: For BioID experiments, wild‐type and mutant forms of LMP1 were expressed from retroviral vectors in C33A cervical carcinoma cells as LMP1‐BirA* fusions and biotinylated fractions immunoblotted with anti‐Actn1 antibodies, leading to the conclusion that LMP1 interacts with a high molecular weight (potentially ubiquitylated) isoform of Actn1 68.