( ( ( Two ( hydrogen-bonded ( spiral configurations ) ) ) ( of ( the ( polypeptide chain ) ) ) ) . )
(ROOT (NP (NP (CD Two) (JJ hydrogen-bonded) (NN spiral) (NNS configurations)) (PP (IN of) (NP (DT the) (JJ polypeptide) (NN chain))) (. .)))
Two hydrogen-bonded spiral configurations of the polypeptide chain.
(ROOT (S (NP (NNP Insulin)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (CD two) (JJ polypeptide) (NNS chains))))) (. .)))