( Hemoglobin ( ( ( ( ( binds oxygen ) ( cooperatively ( due ( to ( steric ( conformation changes ) ) ) ) ) ) ( in ( ( ( the ( protein complex ) ) , ) ( which ( increases ( ( ( hemoglobin 's ) affinity ) ( for oxygen ) ) ) ) ) ) ) ( when ( partially oxygenated ) ) ) . ) )
(ROOT (S (NP (NNP Hemoglobin)) (VP (VBZ binds) (NP (NN oxygen)) (PP (ADVP (RB cooperatively)) (JJ due) (PP (TO to) (NP (JJ steric) (NN conformation) (NNS changes)))) (PP (IN in) (NP (NP (DT the) (NN protein) (NN complex)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ increases) (NP (NP (NP (NN hemoglobin) (POS 's)) (NN affinity)) (PP (IN for) (NP (NN oxygen))))))))) (SBAR (WHADVP (WRB when)) (S (VP (ADVP (RB partially)) (VBN oxygenated))))) (. .)))
Hemoglobin binds oxygen cooperatively due to steric conformation changes in the protein complex, which increases hemoglobin's affinity for oxygen when partially oxygenated.
(ROOT (S (NP (NNP Hemoglobin)) (VP (VBZ is) (NP (NP (DT a) (NN carrier) (NN molecule)) (SBAR (WHNP (WDT that)) (S (VP (VBZ becomes) (ADJP (RBR less) (JJ effective) (PP (IN at) (NP (NP (VBG binding) (NN oxygen)) (PP (IN as) (NP (NN temperature) (NNS increases))))))))))) (. .)))