1

CLCa

proton- exchange into vacuole

[180]

2

NRT2.7

Seed vacuolar nitrate storage

[303]

3

TIP1;2

Maintanance of ammonium homeostasis

[307]

4

TIP2;1

Vacuolar ammonium loading

[309]

5

TIP2;3

Vacuolar ammonium loading

[193]

6

TIPa

Maintenance of urea homeostasis

[242]

7

TIP1;1

Vacuolar loading of urea

[242]

8

TIP2;1

Vacuolar loading of urea

[241]

9

TIP4.1

Urea accumulation

[314]

10

TIP4.4

Vacuolar loading of urea

[241]