( ( ( ( ( ( ( ( ( Inner core ) ( composed ( of ( viral RNA ) ) ) ) , ) ( reverse ( transcriptase ( and ( structural ( core proteins ) ) ) ) ) ) , ) ( surrounded ( by ( ( an ( outer ( bilipid membrane ) ) ) ( that ( contains ( ( ( ( viral ( transmembrane glycoproteins ) ) ( -LRB- ( gp41 -RRB- ) ) ) and ) ( ( external ( membrane glycoproteins ) ) ( -LRB- ( gp120 -RRB- ) ) ) ) ) ) ) ) ) ) ( as ( well as ) ) ) ( components ( of ( host ( plasma membrane ) ) ) ) ) . )
(ROOT (NP (NP (NP (NP (JJ Inner) (NN core)) (VP (VBN composed) (PP (IN of) (NP (JJ viral) (NNP RNA))))) (, ,) (NP (JJ reverse) (NN transcriptase) (CC and) (JJ structural) (NN core) (NNS proteins)) (, ,) (VP (VBN surrounded) (PP (IN by) (NP (NP (DT an) (JJ outer) (JJ bilipid) (NN membrane)) (SBAR (WHNP (WDT that)) (S (VP (VBZ contains) (NP (NP (NP (JJ viral) (NN transmembrane) (NNS glycoproteins)) (PRN (-LRB- -LRB-) (NP (NNP gp41)) (-RRB- -RRB-))) (CC and) (NP (NP (JJ external) (JJ membrane) (NNS glycoproteins)) (PRN (-LRB- -LRB-) (NP (NNP gp120)) (-RRB- -RRB-))))))))))) (CONJP (RB as) (RB well) (IN as)) (NP (NP (NNS components)) (PP (IN of) (NP (NN host) (NN plasma) (NNS membrane)))) (. .)))
Inner core composed of viral RNA, reverse transcriptase and structural core proteins, surrounded by an outer bilipid membrane that contains viral transmembrane glycoproteins (gp41) and external membrane glycoproteins (gp120) as well as components of host plasma membrane.
(ROOT (S (NP (JJ Transmembrane) (NNS proteins)) (VP (VBP span) (NP (DT the) (JJ entire) (NN plasma) (NN membrane))) (. .)))