...]proline uptake by these vesicles was Na + -dependent and greater at pH7.5 than at pH5.5. L-Pipecolate was a competitive inhibitor of L-proline influx into these BBMV, exhibiting a K i value of 0.02 mmol l −1 . The amino acid inhibitors, L-pipecolate, L-alanine and L-leucine were used as test substrates...

... vesicles Na + -dependent hepatopancreas Homarus americanus ion gradients During the last two decades several studies have been conducted on the crustacean gastrointestinal tract to determine the site and properties of nutrient transport in this group of animals. These studies have shown...