topics dealt with in detail include : overall turnover , daily need , enterohepatic circulation and excretion of cobalamin and other corrins . the soluble proteins mediating cobalamin transport and their cellular receptors are described and their nomenclature , isolation , structure and mode of action , the role of calcium in the membrane transport , the evolution of these systems and the analogies with transport systems for other substrates are discussed together with deficiency states , especially fish tapeworm anemia and familial selective vitamin b12 malabsorption with proteinuria .
C0007634
cellular
C1519624
membrane transport