L medium with B27 supplement (Invitrogen), 1 mMNature. Author manuscript; available in
L medium with B27 supplement (Invitrogen), 1 mMNature. Author manuscript; available in PMC 2014 July 18.Ebert et al.PageLglutamine, and one hundred U/mL penicillin/streptomycin. Cells were plated at 1 106 on…