obsolete 1-18:3-2-16:0-phosphatidylglycerol desaturase activity (obsolete GO:0102852)
OBSOLETE. Catalysis of the reaction: 1-18:3-2-16:0-phosphatidylglycerol + O2 + a reduced electron acceptor = 1-18:3-2-trans-16:1-phosphatidylglycerol + 2 H2O + an oxidized electron acceptor.