obsolete 1-18:1-2-trans-16:1-phosphatidylglycerol desaturase activity (obsolete GO:0102655)
OBSOLETE. Catalysis of the reaction: 1-18:1-2-trans-16:1-phosphatidylglycerol + O2 + a reduced electron acceptor = 1-18:2-2-trans-16:1-phosphatidylglycerol + 2 H2O + an oxidized electron acceptor.