( ( ( A ( polypeptide chain ) ) ( containing ( ( ( ( at least ) two ) types ) ( of ( catalytic domains ) ) ) ) ) . )
(ROOT (NP (NP (DT A) (JJ polypeptide) (NN chain)) (VP (VBG containing) (NP (NP (QP (IN at) (JJS least) (CD two)) (NNS types)) (PP (IN of) (NP (JJ catalytic) (NNS domains))))) (. .)))
A polypeptide chain containing at least two types of catalytic domains.
(ROOT (S (NP (NNP Insulin)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (CD two) (JJ polypeptide) (NNS chains))))) (. .)))