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Different turnover of fucose residues in plasma membranes of rat liver and Morris hepatoma 7777.


ABSTRACT: Half-lives and rate constants of degradation of protein-bound fucose have been determined in plasma membranes and total cell homogenates of rat liver and Morris hepatoma 7777. The existence of at least two dynamically different classes of fucose-containing glycoproteins could be demonstrated in both liver and hepatoma plasma membranes. The apparent half-lives were 8.4 and 24.5 h (host liver) and 11.5 and 33.9 h (Morris hepatoma). Since this biphasic loss of fucose residues was not observed for sialic acid [Harms & Reutter (1974) Cancer Res. 34, 3165--3172], the differences are possibly related to specific functions of fucosylated glycoproteins of the plasma membrane.

SUBMITTER: Vischer P 

PROVIDER: S-EPMC1162063 | biostudies-other | 1980 Jul

REPOSITORIES: biostudies-other

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