<unk>  is an electrically insulating phospholipid layer that surrounds the axons of many neurons.  It is an outgrowth of glial cells: Schwann cells supply the<unk>  for peripheral neurons while oligodendrocytes supply it to those of the central nervous system.<unk>  is considered a defining characteristic of the (gnathostome) vertebrates, but it has also arisen by parallel evolution in some invertebrates.<unk>  was discovered in 1878 by Louis-Antoine Ranvier.
Myelin
Eribulin
Suramin
Motor protein
Ovalbumin
Myeloma protein
Crystallin
Globulin