Table 2 Data presented as the mean ± standard deviation of curve fitting for cell-specific Vmax turnover rate (Vmax divided by cell abundance), KM Michaelis–Menten constant, and cell-specific Vmax/KM

From: Multifunctionally diverse alkaline phosphatases of Alteromonas drive the phosphorus cycle in the ocean

Enzymatic parameters of Alteromonas mediterranea culture experiments

Substrate

cell-specific Vmax (mmol cells− 1 s−1)

KM (mmol L−1)

cell-specific Vmax/KM (L cells−1 s−1)

P-monoesterase

 

Control

(3.3 ± 1) × 10−17

(27 ± 0.8) × 10-2

(1.2 ± 0.1) × 10−15

P-limitation

(3.7 ± 0.8) × 10−16

(3.4 ± 0.3) × 10-3

(1.1 ± 0.2) × 10−13

P-diesterase

 

Control

(8.1 ± 1.3) × 10−18

(13.4 ± 5.7) × 10-2

(6 ± 1.6) × 10-17

P-limitation

(1.6 ± 0.4) × 10−16

(25.4 ± 3.2) × 10-2

(6.2 ± 1.9) × 10-16

P-triesterase

 

Control

(1.8 ± 1.2) × 10−17

nd

nd

P-limitation

(9.8 ± 6.7) × 10−18

nd

nd

  1. nd: Not determined due to detection limit. Sulfatase activities were all below detection limits.
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