in contrast , initial methyl group turnover rates obtained after less than 20 % of the total methyl groups are turned over in ( aa ) cells show most rapid demethylation rates for membrane polypeptides migrating at 40,000-55,000 da , polypeptides comigrating with band 4.5 , cytoskeletal components bands 2.1 and 4.1 .
C0007634
cells
C0010853
cytoskeletal