– May play a role in signalling in oligodendrocytes in the early stages of their terminal differentiation into myelin-forming glia and may also function in stabilizing the mature sheath. Tetraspanin-2/TSPAN2 Protein, Human, Recombinant is expressed in E. coli expression system. The predicted molecular weight is 8.8 kDa and the accession number is O60636.