Absorption of glucose, amino acids, and dipeptides by the intestines of Atlantic salmon (Salmo salar L.).

摘要: Rates of glucose, amino acid and dipeptide absorption by the intestine Atlantic salmon (Salmo salar L.) were measured in vitro at 10 °C as functions concentration region using intact tissues (everted sleeve method). Salmon (weight range 300–1300 g) fed a commercial, extruded feed, kept 12–13 freshwater. Maximum rates (Vmax) glucose transport low compared to most Vmax values. There was declining proximal-to-distal gradient along post-gastric intestinal tract. A saturable component not evident for proline glycyl-proline distal intestine, glycyl-sarcosine any region. `Apparent diffusion', which may include affinity, high capacity carrier systems carrier-independent influx, appears account majority total uptake higher concentrations acids dipeptides. competition between dipeptides transporter sites pyloric ceca mid suggesting common carrier. also indication hydrolysis these brush border membrane enzymes.