second , the four major forms of myelin basic protein , with molecular weights of 21,500 , 18,500 , 17,000 , and 14,000 , that are present in wild-type mouse cns are undetectable in either whole brain or purified myelin of shi/shi animals , and each of the four proteins is reduced commensurately in brain and myelin of +/shi animals .
C3714787
cns
C0006104
brain