Table 4.

Apparent kinetic parameters of ß-ureidopropionases from different organisms with the substrate ß-ureidopropionic acid.

Km app (mM)	apparent specific activity (µmol min-1 mg-1)	kcat app (s-1)	kcat app/Km app (s-1 M-1)	Organism
0.008	0.88	0.65	8.1 x 104	Rattus norvegicus 1
0.019	–	0.31	1.6 x 104	Homo sapiens 2
0.011	–	–	–	Zea mays 3*
0.006	0.47	0.37	6.1 x 10 4	Arabidopsis thaliana 4**
2.1	–	26	1.2 x 10 4	Agrobacterium tumefaciens 5*
0.14 ± 0.01	3.12 ± 0.08	2.54 ± 0.07	1.81 x 104	Oryza sativa 6**

¹ Traut (2000), ² Maurer et al. (2018). ³ Walsh et al. (2001), ⁴ Andersen et al. (2008), ⁵ Martínez-Gómez et al. (2009), ⁶This work. *Activity was measured at 30°C. **Activity was measured at 25°C. The mammalian enzyme activities were measured at 37°C. The symbol “-“ indicates that data are not available.