Table 4 List of enzyme activities reported in cattle and other mammals that do not have a mammalian gene identified

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]