( ( ( ( ( Instead ( , ( it ( is ( able ( to ( ( recognize ( at ( the ( molecular level ) ) ) ) ( ( a component ) ( of ( ( a ( bacterium 's ) ) ( cell wall ) ) ) ) ) ) ) ) ) ) ) and ) , ) ( ( ( having ( keyed ( onto ( this element ) ) ) ) , ) ( ( break down ) ( ( the wall ) ( destroying ( the ( foreign organism ) ) ) ) ) ) ) . )
(ROOT (S (S (ADVP (RB Instead)) (, ,) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ able) (S (VP (TO to) (VP (VB recognize) (PP (IN at) (NP (DT the) (JJ molecular) (NN level))) (NP (NP (DT a) (NN component)) (PP (IN of) (NP (NP (DT a) (NN bacterium) (POS 's)) (NN cell) (NN wall)))))))))) (CC and) (, ,) (S (S (VP (VBG having) (VP (VBN keyed) (PP (IN onto) (NP (DT this) (NN element)))))) (, ,) (S (VP (VB break) (PRT (RP down)) (NP (NP (DT the) (NN wall)) (VP (VBG destroying) (NP (DT the) (JJ foreign) (NN organism))))))) (. .)))
Instead, it is able to recognize at the molecular level a component of a bacterium's cell wall and, having keyed onto this element, break down the wall destroying the foreign organism.
(ROOT (S (NP (DT A) (NN lysozyme)) (VP (VBZ destroys) (NP (NNS bacteria)) (PP (IN by) (S (VP (VBG digesting) (NP (PRP$ their) (NN cell) (NNS walls)))))) (. .)))