( ( ( Scanning ( ( Bacterial Genomes ) ( for Clues ) ) ) ( to ( ( the Evolution ) ( of ( the ( Tryptophan Operon ) ) ) ) ) ) - )
(ROOT (S (VP (VBG Scanning) (NP (NP (NNP Bacterial) (NNP Genomes)) (PP (IN for) (NP (NNP Clues)))) (PP (TO to) (NP (NP (DT the) (NNP Evolution)) (PP (IN of) (NP (DT the) (NNP Tryptophan) (NNP Operon)))))) (: -)))
Scanning Bacterial Genomes for Clues to the Evolution of the Tryptophan Operon -
(ROOT (S (NP (VBG Comparing) (NN genome) (NNS sequences)) (VP (VBZ provides) (NP (NNS clues)) (PP (TO to) (NP (NN evolution) (CC and) (NN development)))) (. .)))