( ( Each antibody ) ( ( can ( ( bind only ) ( to ( one ( specific antigen ) ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN antibody)) (VP (MD can) (VP (VB bind) (ADVP (RB only)) (PP (TO to) (NP (CD one) (JJ specific) (NN antigen))))) (. .)))
Each antibody can bind only to one specific antigen.
(ROOT (S (NP (DT An) (NN antibody)) (VP (MD can) (VP (VB match) (NP (NP (CD one) (NNS types)) (PP (IN of) (NP (NNS antigens)))))) (. .)))