Table 4.

List of enzyme activities reported in cattle and other mammals that do not have a mammalian gene identified

Pathway	Enzyme name	EC number*	Mammalian species
Ascorbate glutathione cycle	L-ascorbate peroxidase†	1.11.1.11	cattle [21]
4-hydroxyproline degradation	4-hydroxy-2-oxoglutarate aldolase	4.1.3.16	cattle [27-30], rat [22]
Ascorbate biosynthesis	gluconolactonase	3.1.1.17	cattle [23,25], pig [35]
Ascorbate biosynthesis	uronolactonase	3.1.1.19	cattle [37], pig [37], rabbit [37], monkey [37], dog [37], guinea pig [37], rat [33,37]
γ-glutamyl cycle	γ-glutamyl cyclotransferase	2.3.2.4	cattle [26], human [38], rat [34], mouse [24], pig [36]
Selenocysteine biosynthesis	selenocysteine synthase	2.9.1.1	mouse [32], cattle [31]

*Enzyme Commission number

^†Partial sequence of the protein is known (UniProt: Q7M3G0)