( ( ( Molecular regulation ) ( of ( smooth-muscle contraction ) ) ) ; )
(ROOT (NP (NP (JJ Molecular) (NN regulation)) (PP (IN of) (NP (JJ smooth-muscle) (NN contraction))) (: ;)))
Molecular regulation of smooth-muscle contraction;
(ROOT (S (NP (JJ Smooth) (NN muscle)) (VP (VBZ regulates) (NP (NP (NN air) (NN flow)) (PP (IN in) (NP (NNS lungs))))) (. .)))
Smooth muscle regulates air flow in lungs.