Z. Sun et al., DIFFERENTIAL EXPRESSION OF 2 ISOPENTENYL PYROPHOSPHATE ISOMERASES ANDENHANCED CAROTENOID ACCUMULATION IN A UNICELLULAR CHLOROPHYTE (VOL 95, PG 11482, 1998), Proceedings of the National Academy of Sciences of the United Statesof America, 95(24), 1998, pp. 14585-14585