Effects of BFA on L-leucine transport in strain MMY2.
MMY2 cells were incubated on MPD broth containing SDS
(3 × 10-3%) and BFA (40 μg mL-1) during 10 or 20
minutes. To eliminate BFA, cells were centrifuged and the
precipitate resuspended in fresh MPD. After another 60-minute
incubation, cells were again centrifuged, and each pellet was
resuspended at a concentration of 5 × 108 cells mL-1
in distilled H2O. For amino acid uptake values at zero or
5 minutes, 100 μL of the suspension was mixed with
100 μL-14C-Leucine, 0.1 mmol l-1
(5 mCi mmol-1). As a control for each time, an
incubation in MPD with SDS was used. Viability determinations on
aliquots of each incubation gave 70% for the 10-minute incubation
and 58% for the 20-minute incubation.