Table 1 FeSII and nitrogenase interacting residues

K14

E71*

6.5

Salt bridge

K14

E73*

2.5

H-bond (side chain-side chain)

K15

D74*

6.6

Salt bridge

K15

E73*

4.6

Salt bridge

K15

K84*

3.8

H-bond (side chain-backbone)

Y4'

E288*

4.0

H-bond (backbone-side chain)

K14'

E112*

5.9

Salt bridge

K15'

E288

2.7

H-bond (side chain-side chain)

Q17'

E287

2.6

H-bond (side chain-backbone)

K36'

D388

3.2

H-bond (side chain-side chain)