( Fibrinogen ( ( is ( one ( of ( ( the ( plasma proteins ) ) ( in ( the blood ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Fibrinogen)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (NN plasma) (NNS proteins)) (PP (IN in) (NP (DT the) (NN blood))))))) (. .)))
Fibrinogen is one of the plasma proteins in the blood.
(ROOT (S (NP (DT The) (JJ complement) (NN system)) (VP (VBZ is) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NP (NNS proteins)) (VP (ADVP (RB constitutively)) (VBN found) (PP (IN in) (NP (DT the) (NN blood) (NN plasma)))))))) (. .)))