( ( For example ) ( , ( ( the ( influenza ( hemagglutinin protein ) ) ) ( ( is ( ( a ( single ( polypeptide chain ) ) ) ( which ( ( when activated ) ( , ( ( is ( proteolytically cleaved ) ) ( to ( form ( two ( polypeptide chains ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (DT the) (NN influenza) (NN hemagglutinin) (NN protein)) (VP (VBZ is) (NP (NP (DT a) (JJ single) (NN polypeptide) (NN chain)) (SBAR (WHNP (WDT which)) (S (SBAR (WHADVP (WRB when)) (S (VP (VBN activated)))) (, ,) (VP (VBZ is) (ADJP (RB proteolytically) (JJ cleaved)) (S (VP (TO to) (VP (VB form) (NP (CD two) (JJ polypeptide) (NNS chains)))))))))) (. .)))
For example, the influenza hemagglutinin protein is a single polypeptide chain which when activated, is proteolytically cleaved to form two polypeptide chains.
(ROOT (S (NP (NNP Insulin)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (CD two) (JJ polypeptide) (NNS chains))))) (. .)))