Classification of proteins secreted from F3.Olig2 cells.

A: proteins expressed in oligodendrocytes; B: proteins associated with, but not known to be secreted from, oligodendrocytes; C: proteins not reported to be associated with the biology of oligodendrocytes; R: mRNA-SEQ; Q: qRT-PCR; NA: not applicable to oligodendrocyte biology; OL: oligodendrocyte; OPC: oligodendrocyte progenitor cell; ( ): reports in different cell typesProteins that were upregulated at both the mRNA level and the secreted protein level comprised three distinct groups, indicated here as A, B, and C.