BCR and infection: Transcriptome profiling of DT40 cells infected with vvIBDV shows that the expression of Janus Kinase 1 and Protein Tyrosine Kinase 2 decreases at 12, 18, and 24 hours post-infection (hpi), which further attenuates the triggering of the BCR signal pathway and thus affects the BCR antigen recognition signal pathway (53).