( ( ( ( ( This ( ( is also ) ( ( a classification ) ( of ( protein domains ) ) ) ) ) , ) and ) ( ( high ( resolution ( tertiary structures ) ) ) ( are ( a requirement ) ) ) ) . )
(ROOT (S (S (NP (DT This)) (VP (VBZ is) (ADVP (RB also)) (NP (NP (DT a) (NN classification)) (PP (IN of) (NP (NN protein) (NNS domains)))))) (, ,) (CC and) (S (NP (JJ high) (NN resolution) (NN tertiary) (NNS structures)) (VP (VBP are) (NP (DT a) (NN requirement)))) (. .)))
This is also a classification of protein domains, and high resolution tertiary structures are a requirement.
(ROOT (S (NP (DT A) (NN domain)) (VP (VBZ is) (NP (NP (DT the) (JJS highest) (NN taxon)) (PP (IN in) (NP (NP (DT the) (NN classification)) (PP (IN of) (NP (VBG living) (NNS things))))))) (. .)))