( ( Iron ( in ( human body ) ) ) ( ( ( ( is ( tightly bound ) ) , ) ( either ( in ( ( ( ( ( ( hemoglobin ( -LRB- ( ( blood cells ) -RRB- ) ) ) , ) ( on ( ( transferrin proteins ) ( -LRB- ( ( ( serum and ) lymph ) -RRB- ) ) ) ) ) , ) or ) ( lactoferrin ( -LRB- ( ( ( ( ( milk , ) tears ) , ) ( saliva ( , ( ( mucus , ) etc. ) ) ) ) -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Iron)) (PP (IN in) (NP (JJ human) (NN body)))) (VP (VBZ is) (ADJP (RB tightly) (VBN bound)) (, ,) (PP (CC either) (IN in) (NP (NP (NP (NN hemoglobin)) (PRN (-LRB- -LRB-) (NP (NN blood) (NNS cells)) (-RRB- -RRB-)) (, ,) (PP (IN on) (NP (NP (NN transferrin) (NNS proteins)) (PRN (-LRB- -LRB-) (NP (NP (NN serum)) (CC and) (NP (NN lymph))) (-RRB- -RRB-))))) (, ,) (CC or) (NP (NP (NN lactoferrin)) (PRN (-LRB- -LRB-) (NP (NN milk)) (, ,) (NP (NNP tears)) (, ,) (NP (NNS saliva) (, ,) (NNS mucus) (, ,) (FW etc.)) (-RRB- -RRB-)))))) (. .)))
Iron in human body is tightly bound, either in hemoglobin (blood cells), on transferrin proteins (serum and lymph), or lactoferrin (milk, tears, saliva, mucus, etc.).
(ROOT (S (NP (NNP Human) (NNP lysozyme)) (VP (VBZ is) (NP (NP (DT an) (JJ antibacterial) (NN protein)) (VP (VBN found) (PP (IN in) (NP (NNS tears) (CC and) (NN saliva)))))) (. .)))