Enzyme Source | High-Affinity Isoform | Low-Affinity Isoform | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Km | Vmax | Vmax/Km | Km | Vmax | Vmax/Km | |||||
μM | pmol/min/mg | nl/min/mg protein | μM | pmol/min/mg | nl/min/mg protein | |||||
Purified enzyme | 108.2 | 32.71 | 302.3 | |||||||
Cytosol | 10.8 | 0.09 | 8.1 | 66.1 | 0.28 | 4.2 | ||||
Microsomes | 9.7 | 0.45 | 46.6 | 269.0 | 4.22 | 15.7 |