...G. M. Hanozet; V. F. Sacchi; S. Nedergaard; P. Bonfanti; S. Magagnin; B. Giordana ABSTRACT Amino acid accumulation within brush-border membrane vesicles (BBMV) from the larval midgut of Lepidoptera is driven by a K + gradient. However, it can also be driven by a Na + gradient, although with reduced...

...Gregory A. Ahearn; Rachel D. Behnke ABSTRACT Purified brush-border membrane vesicles (BBMV) of starfish [ Pycnopodia helianthoides (Brandt)] pyloric caecal epithelium were prepared by magnesium precipitation in order to characterize the possible role of this organ in amino acid transport. L-[ 3 H...

... by at least one carrier-mediated process that displays properties in common with gastrointestinal absorptive organs of animals from a variety of phyla. 06 12 1989 © 1990 by Company of Biologists 1990 pyloric caeca echinoderms amino acid transport brush-border membrane vesicles Na...

...V. Franca Sacchi; Barbara Giordana; Flavia Campanini; Patrizia Bonfanti; Giorgio M. Hanozet ABSTRACT A potassium- or sodium-activated cotransport of leucine occurs in brush-border membrane vesicles prepared from the midgut of larvae of Philosamia cynthia (Drury). The potassium chemical gradient can...

... experiments performed with brush-border membrane vesicles. The vesicles were preloaded with 14 different unlabelled amino acids, whose ability to elicit an intravesicular accumulation over the equilibrium value of six labelled amino acids (L-alanine, L-leucine, L-phenylalanine, L-glutamic acid, L-lysine and L...

...Teva Siu; Gregory A. Ahearn ABSTRACT The mechanism of [ 3 H]myo-inositol transport by the lobster hepatopancreas was examined using purified brush-border membrane vesicles. Transport was stimulated by a 100 mmol 1 −1 inward Na + gradient, but other cation gradients were ineffective, suggesting a Na...

...Gregory A. Ahearn; Laurel P. Clay ABSTRACT Uptake of L-[ 3 H]leucine by lobster hepatopancreatic brush-border membrane vesicles was stimulated by a transmembrane NaCl gradient (o>i), but not by identical gradients of NaSCN or other Cl − salts (e.g. K + , Li + , NH 4 + , Cs + or choline...

... angiotensin converting enzyme small intestine brush-border membrane vesicles birds Quiscalus quiscula Ramipril Angiotensin converting enzyme (ACE, kininase II, peptidyldipeptidase; E.C. 3.4.15.1) converts angiotensin I to angiotensin II, and hydrolyses a variety of bioactive peptides...