2.3.1.274 - 2.3.1.274 cooverexpression of native phospholipid-biosynthetic genes plsX and plsC enhances lipid production in Synechocystis sp. PCC 6803 2.3.1.274 expression in Escherichia coli 2.3.1.274 gene plsXX, recombinant expression of wild-type and mutant enzymes in Escherichia coli strain C43(DE3)