( ( Each antibody ) ( ( can ( bind ( to ( ( only one ) ( specific antigen ) ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN antibody)) (VP (MD can) (VP (VB bind) (PP (TO to) (NP (QP (RB only) (CD one)) (JJ specific) (NN antigen))))) (. .)))
Each antibody can bind to only 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)))))) (. .)))