Table 3 The residues corresponding to Asp 80 of NbXIP1;1 and the residues in four of the positions in the ar/R selectivity filter

XIP-I

I

H/Q^b

G/A/Q

A/T

R

^c

XIP-II, Clade A

T/S

V/I/G

I/V/T/S

V/A

R

^c

XIP-III, Clade B

D

V/I/A

T/S

V/A

R

^c

XIP-IV, Clade B

D

I/L/A

T

A/V

R

^c

TIP1s, Gymnosperm

E

H^b

I

A

R

^d

TIP1s, Mono/dicot

Q/S

H

I

A

V

^d

TIP3s, Mono/dicots

E

H^b

I/M

A

R

^d

PfAQP

E

W

G

F

R

^e