OLIG2 and myeloid sarcoma: Among those, MBP, a structural protein that participates in myelin sheath formation [38], as well as Olig2 transcription factor [4, 39], Nogo‐A, and BCAS1 are significant myelinating oligodendrocyte markers found consistently increased in chronic EAE [23] and at the edges of demyelinating MS lesions [40, 41].