chemical modification of apoe2 ( arg158 -- -- cys ) with sulfhydryl reagents ( 2-bromoethyl ) -trimethylammonium bromide or cysteamine , which convert cysteine to arginyl or lysyl analogues , respectively , abolishes the difference in apparent molecular weight and results in the co-electrophoresis of e2 ( arg158 -- -- cys ) with other apoe forms .
C0052198
apoe2
C0003595
apoe