Delta-6 desaturase (22:6(4Z,7Z,10Z,13Z,16Z,19Z)/18:3(6Z,9Z,12Z))(PC sn-2)
2.0 nadh_c + o2_c + 2.0 ficytb5_c + pc226n3182n6_c ⇌ 2.0 h2o_c + 2.0 nad_c + 2.0 focytb5_c + pc226n3183n6_c