There were many enzymes in flavonoids metabolic synthesis pathway, but chalcone synthase (CHS) and phenylalanine ammonia-lyase(PAL) was the key enzyme.

• 银杏叶黄酮合成代谢中涉及到十几种酶,而查尔酮合成酶(CHS)和苯丙氨酸解氨酶(PAL)是银杏叶黄酮合成代谢途径中的关键酶。