Table 1.
Conditions | L-citrulline transport (% control) |
---|---|
Na+-free | 67±5* |
pH 5 | 112±6 |
pH 6 | 106±5 |
pH 8 | 89±1 |
Dependency of L-citrulline transport on extracellular sodium or varying pH was examined using either nominally Na+-free Krebs or buffers with pH values ranging from 5 to 8. Transport of L-citrulline (0.1 mM) was measured in unstimulated cells over a 10 min period. Data are expressed as a percentage of the influx rate obtained in normal Na+-containing Krebs maintained at pH 7.4 (100%=0.31±0.04 pmol μg protein−1 min−1). Values denote the means±s.e.m. of experiments in three different cell cultures with five replicates in each experiment.
P<0.05 compared to control.