( Gram ( - ( ( ( ( ( ( negative bacteria ) , ) ( in contrast ) ) , ) ( have ( ( ( ( cell envelopes ) ( consisting ( of ( a ( thinner ( cell wall ) ) ) ) ) ) ( as ( well as ) ) ) ( ( ( a ( ( membrane ( external ( to ( the cell ) ) ) ) wall ) ) ( -LRB- ( ( outer membrane ) -RRB- ) ) ) ( which ( ( is ( in addition ) ) ( to ( ( the ( plasma membrane ) ) ( found ( inside ( the ( cell wall ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (FRAG (NP (NNP Gram)) (: -) (S (NP (NP (JJ negative) (NNS bacteria)) (, ,) (PP (IN in) (NP (NN contrast))) (, ,)) (VP (VBP have) (NP (NP (NP (NN cell) (NNS envelopes)) (VP (VBG consisting) (PP (IN of) (NP (DT a) (JJR thinner) (NN cell) (NN wall))))) (CONJP (RB as) (RB well) (IN as)) (NP (NP (NP (DT a) (ADJP (RB membrane) (JJ external) (PP (TO to) (NP (DT the) (NN cell)))) (NN wall)) (PRN (-LRB- -LRB-) (NP (JJ outer) (NN membrane)) (-RRB- -RRB-))) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (PP (IN in) (NP (NN addition))) (PP (TO to) (NP (NP (DT the) (NN plasma) (NN membrane)) (VP (VBN found) (PP (IN inside) (NP (DT the) (NN cell) (NN wall))))))))))))) (. .)))
Gram -negative bacteria, in contrast, have cell envelopes consisting of a thinner cell wall as well as a membrane external to the cell wall (outer membrane) which is in addition to the plasma membrane found inside the cell wall.
(ROOT (S (NP (JJ Prokaryotic) (NNS cells)) (VP (VBP have) (NP (NP (DT a) (NN cell) (NN wall)) (PP (IN outside) (NP (PRP$ their) (NN plasma) (NN membrane))))) (. .)))