sucrose-density-gradient centrifugation of membrane-associated proteins isolated from chick-embryo brains identified three proteins , mr 161,000 , 116,500 and 103,000 , that were labelled with [ 3h ] di-isopropyl phosphorofluoridate in an nte-like manner and that co-migrated with nte .
C0025252
membrane-associated proteins
C0033684
proteins