ID 1.14.19.45 DE sn-1 oleoyl-lipid 12-desaturase. CA a 1-[(9Z)-octadecenoyl]-2-acyl-glycerolipid + 2 H(+) + O2 + 2 reduced CA [2Fe-2S]-[ferredoxin] = a 1-[(9Z,12Z)-octadecdienoyl]-2-acyl-glycerolipid CA + 2 H2O + 2 oxidized [2Fe-2S]-[ferredoxin]. CC -!- The enzyme, characterized from cyanobacteria, introduces a cis double CC bond at carbon 12 of oleoyl groups (18:1) attached to the sn-1 CC position of glycerolipids. CC -!- The enzyme is a methyl-end desaturase, introducing the new double CC bond between a pre-existing double bond and the methyl-end of the CC fatty acid. CC -!- It is non-specific with respect to the polar head group of the CC glycerolipid. DR Q79F72, DESA_ANAVA ; Q54794, DESA_ARTPT ; Q55231, DESA_PICP2 ; DR P20388, DESA_SYNY3 ; Q55230, DESA_SYNY4 ; //