Reaction catalyzed by acyl-lipid omega-6 desaturase (cytochrome b5) (1.14.19.22), acyl-lipid (n+3)-(Z)-desaturase (ferredoxin) (1.14.19.23)

+

reduced ferredoxin [iron-sulfur] cluster

+

+

=

+

oxidized ferredoxin [iron-sulfur] cluster

+

H2O

oleoyl-[glycerolipid]

+

reduced ferredoxin [iron-sulfur] cluster

+

O2

+

H+

=

linoleoyl-[glycerolipid]

+

oxidized ferredoxin [iron-sulfur] cluster

+

H2O