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The phrase "a km of" is correct and usable in written English.
It can be used when referring to a specific length or distance, typically in contexts related to measurement or geography.
Example: "The hiking trail stretches for a km of beautiful scenery along the riverbank."
Alternatives: "a kilometer of" or "one kilometer of".
Exact(60)
Nafcillin uptake by human hepatocytes was saturable with a Km of 533 μM.
A Km of 13.5 ± 2 mM for l-arginine was calculated for the HsARGI.
Enzyme kinetics showed that the enzyme has a Km of 14.2 mM and a specific activity of 0.12 U/mg.
Using 2,2′-azinobis 3-ethylbenzthiazoline-6-sulfonic 2,2′-azinobis 3-ethylbenzthiazoline-6-sulfonic 2,2′-azinobis 3-ethylbenzthiazoline-6-sulfonic 2,2′-azinobis 3-ethylbenzthiazoline-6-sulfonic 2,2′-azinobis 3-ethylbenzthiazoline-6-sulfonic
LmARG exhibited a Km of 25 ± 4 mM for l-arginine, a pH optimum ∼9.0, and was dependent upon the presence of a divalent cation, preferentially manganese.
In kinetic analysis, 1 was found to be a good substrate with a Km of 23.7 μM and a Vmax of 159 pmol/h.
In contrast, the W298H mutant displayed novel somanase activity with a kcat of 5 min− 1 and a KM of 590 μM at pH 7.5.
The 6×His-rGalE with a Km of 0.5 mM for UDP-galactose exhibited optimum activity at 37 °C and pH 8 9.
hENT1 transports the substrate adenosine with a Km of 215 ± 34 µmol/L and a Vmax of 578 ± 23.4 nmol mg−1 mg−11.
WT had a specific activity of 390 U/mg, a Km of 0.71 mM and a catalytic efficiency of 287 s−1mM−1.
The enzyme was inducible and the purified enzyme had a KM of 1.4 mM and a Kcat of 103 s−1(Cavin et al. 1997b).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com