Alternatively, the data could suggest that a single PxxP motif may not be sufficient to mimic MBP well; indeed, LMP2A from Epstein–Barr virus (EBV), which has 4 PxxP motifs [13], has been associated with MS [99,100,101] and EBV is generally considered a more likely candidate as a viral risk factor for MS [11]. This evidence concerns the gene MBP and myeloid sarcoma.