( ( The ( plastid ( transformation system ) ) ) ( ( allows ( us ( to ( stably ( ( introduce ( foreign DNA ) ) ( into ( ( the ( plastid compartment ) ) ( of tobacco ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ plastid) (NN transformation) (NN system)) (VP (VBZ allows) (S (NP (PRP us)) (VP (TO to) (VP (ADVP (RB stably)) (VB introduce) (NP (JJ foreign) (NN DNA)) (PP (IN into) (NP (NP (DT the) (JJ plastid) (NN compartment)) (PP (IN of) (NP (NN tobacco))))))))) (. .)))
The plastid transformation system allows us to stably introduce foreign DNA into the plastid compartment of tobacco.
(ROOT (S (PP (IN Like) (NP (NN mitochondria))) (, ,) (NP (NNS plastids)) (VP (VBP contain) (NP (PRP$ their) (JJ own) (NN dna))) (. .)))