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THE GLUCOSE TRANSPORT SYSTEM OF AMPHORA COFFEAEFORMIS (BACILLARIOPHYCEAE) 1
Author(s) -
Chansang H.,
Cooksey K. E.
Publication year - 1977
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1977.tb02886.x
Subject(s) - hexose , biology , fructose , transport system , mannose , d glucose , carbohydrate , biochemistry , glucose uptake , carbohydrate metabolism , enzyme , endocrinology , insulin , transport engineering , engineering
Amphora coffeaeformis (Ag.) Kütz. var. perpusilla (Grun.) Cleve took up glucose by an inducible transport system. The system was induced by d ‐fructose, d ‐mannose, as well as glucose. Some d ‐pentoses also induced a glucose uptake system but it may not be the same one as that induced by hexose. d ‐fructose, d ‐mannose and 2‐deoxy‐ d ‐glucose inhibited 2 mM glucose uptake at equimolar concentration, but d ‐pentoses did not. The uptake system decayed in ca. 5 h in the absence of glucose. The half‐saturation constant for uptake, K 8 was ca. 0.1 mM glucose with a maximum uptake rate, V max = 0.4 nmol/10 6 cells‐min −1 .