MAG and Oculomotor apraxia: MAG proteins expressed by myelination cells and are designated as Siglec-4a (sialic acid-binding immunoglobulin type lectin) necessary for axon attachment with glial cells, axon regenerating, neurites outgrowth inhibition, and neuron protection from axonal damage and any missense variations lead to oculomotor apraxia, neuropathy ataxia [102].