Queried GO terms:

  idGO:0042552   Detailed information
  namemyelination
  namespacebiological_process
  def"The process in which myelin sheaths are formed and maintained around neurons. Oligodendrocytes in the brain and spinal cord and Schwann cells in the peripheral nervous system wrap axons with compact layers of their plasma membrane. Adjacent myelin segments are separated by a non-myelinated stretch of axon called a node of Ranvier." [GOC:dgh, GOC:mah]
  xrefWikipedia:Myelin
  is_aGO:0008366 ! axon ensheathment

Monarch genes with this GO terms:

  DPGLEAN04862

  DPGLEAN06368

  DPGLEAN18201