The present invention provides engineered phenylalanine ammonia-lyase (PAL) enzymes comprising one or more mutations that increase the enzymes' tyrosine ammonia-lyase (TAL) activity. Also provided are plants comprising the engineered PAL enzymes and methods of using these plants to sequester CO.sub.2 or produce phenylpropanoid-derived products.

The invention generally relates to arogenate dehydrogenase polynucleotides and methods of using the same. More specifically, the invention relates in part to compositions including arogenate dehydrogenase polynucleotides from beet varieties and other Caryophyllales species and methods of using the same.

The invention generally relates to arogenate dehydrogenase polynucleotides and methods of using the same. More specifically, the invention relates in part to compositions including arogenate dehydrogenase polynucleotides from beet varieties and other Caryophyllales species and methods of using the same.