( Overall ( , ( ( this protein ) ( ( plays ( ( a role ) ( in ( nervous ( system development ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Overall)) (, ,) (NP (DT this) (NN protein)) (VP (VBZ plays) (NP (NP (DT a) (NN role)) (PP (IN in) (NP (JJ nervous) (NN system) (NN development))))) (. .)))
Overall, this protein plays a role in nervous system development.
(ROOT (S (NP (DT The) (JJ nervous) (NN system)) (VP (VBZ plays) (NP (NP (DT a) (JJ critical) (NN role)) (PP (IN in) (NP (NP (DT the) (NN regulation)) (PP (IN of) (NP (NN vascular) (NNS homeostasis))))))) (. .)))