Similarly, the apparent affinity for Mg2+
increased up to 10‰ salinity, with KM= 0.46± 0.04 mmol L−1
, about
2-fold less than in fresh water (KM= 0.92± 0.09 mmol L−1
); further
salinity increase had little effect on the KM for Mg2+ (Fig. 3B).
Differently, the KI for bafilomycin A1 was fairly constant over the
salinity range used (Fig. 3C).