( bond ( ( phos ( Bonds ( in ( ( phosphate group ) ( of ( a ( nucleic acid ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN bond)) (VP (VBZ phos) (NP (NP (NNS Bonds)) (PP (IN in) (NP (NP (JJ phosphate) (NN group)) (PP (IN of) (NP (DT a) (JJ nucleic) (NN acid))))))) (. .)))
bond phos Bonds in phosphate group of a nucleic acid.
(ROOT (S (NP (JJ Individual) (NNS nucleotides)) (VP (MD can) (VP (VB be) (VP (VBN linked) (ADVP (RB together)) (PP (IN through) (NP (PRP$ their) (JJ phosphate) (NNS groups))) (S (VP (TO to) (VP (VB form) (NP (JJ nucleic) (NN acid) (NNS polymers)))))))) (. .)))