## Michaelis constant, $$K_{\text{m}}$$

https://doi.org/10.1351/goldbook.M03891
substance concentration of substrate at which the rate of reaction is equal to one half of the limiting rate (maximum rate).
Notes:
1. Also called the Michaelis concentration
2. The Michaelis constant (Michaelis concentration) may be used only when @M03892@ is obeyed.
Source:
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 981 (https://doi.org/10.1351/pac199668040957)